User:Hosmich/Twin flags

While creating list of real flags suitable as symbols for languages, I found two pairs of nearly identical flags: Nordic cross yellow, red (Norn and Old Norse) and Nordic cross green, yellow, blue (Low Saxon and Veps). I was aware of more "twin flags" (Monaco and Indonesia, Romania and Chad...), so I created this gallery to catch them. First I tried to show as many twins as possible, now I list only categories for striped flags. If some category contains only one flag, it should be removed from this list, unless it is Nordic Cross flag.

Terminology: Flags are nested by colors in English alphabet order. Tricolor flags are nested by their first two basic colors. Basic colors are black, blue, green, red, white and yellow. But it is easy to find flag with desired color regardless of their order. Every tricolor category can contain six permutations of twins. Total number of possible twin flag sets with two or three stripes and six basic colors is 360. How many is used, I have no guess.
 * Twin = same shape, colors, order, different hues or proportions
 * Sibling = twin defaced with different emblem (Slovakia and Slovenia)
 * Cousin = switched colors within same shape or modified shape within same colors (e.g. rotation, fimbriation)

I recommend visit Flag Identifier by Ivan Sarajčić for creating "identikit" of flag searched (including twins). For Nordic crosses see also this list from FOTW.

Black and blue

 * commons:Category:Horizontal bicolor black and blue flags
 * commons:Category:Vertical bicolor black and blue flags

Black, blue, brown

 * commons:Category:Flags with three horizontal stripes of black, blue and brown color combination‎

Black, blue, green

 * commons:Category:Flags with three horizontal stripes of black, blue and green color combination
 * commons:Category:Flags with three vertical stripes of black, blue and green color combination‎

Black, blue, orange

 * commons:Category:Flags with three horizontal stripes of black, blue and orange color combination

Black, blue, red

 * commons:Category:Flags with three horizontal stripes of black, blue and red color combination
 * commons:Category:Flags with three vertical stripes of black, blue and red color combination

Black, blue, white
Nordic cross:
 * commons:Category:Flags with three horizontal stripes of black, blue and white color combination‎
 * commons:Category:Flags with three vertical stripes of black, blue and white color combination‎

Black, blue, yellow

 * commons:Category:Flags with three horizontal stripes of black, blue and yellow color combination‎
 * commons:Category:Flags with three vertical stripes of black, blue and yellow color combination

Black and green

 * commons:Category:Horizontal bicolor black and green flags
 * commons:Category:Vertical bicolor black and green flags

Black, green, orange

 * commons:Category:Flags with three horizontal stripes of black, green and orange color combination‎
 * commons:Category:Flags with three vertical stripes of black, green and orange color combination‎

Black, green, red
Kenya and South Sudan are fimbriated cousins Nordic cross:
 * commons:Category:Flags with three horizontal stripes of black, green and red color combination‎
 * commons:Category:Flags with three vertical stripes of black, green and red color combination

Black, green, white
Nordic cross:
 * commons:Category:Flags with three horizontal stripes of black, green and white color combination
 * commons:Category:Flags with three vertical stripes of black, green and white color combination

Black, green, yellow

 * commons:Category:Flags with three horizontal stripes of black, green and yellow color combination
 * commons:Category:Flags with three vertical stripes of black, green and yellow color combination

Black and orange

 * commons:Category:Vertical bicolor black and orange flags

Black and red

 * commons:Category:Horizontal bicolor black and red flags‎
 * commons:Category:Vertical bicolor black and red flags‎

Black, red, black

 * commons:Category:Flags with three horizontal stripes, one red, two black

Black, red, white

 * commons:Category:Flags with three horizontal stripes of black, red and white color combination‎
 * commons:Category:Flags with three vertical stripes of black, red and white color combination‎

Black, red, yellow
Middle red stripe (cousins):
 * commons:Category:Flags with three horizontal stripes of black, red and yellow color combination‎
 * commons:Category:Flags with three vertical stripes of black, red and yellow color combination‎

Olitopia (alternate history) is cousin

Red, black, red

 * commons:Category:Flags with three horizontal stripes, one black, two red‎

Black and white
White cross (cousins):
 * commons:Category:Horizontal bicolor black and white flags
 * commons:Category:Vertical bicolor black and white flags‎

Black, orange, white

 * commons:Category:Flags with three horizontal stripes of black, orange and white color combination

Black, pink, white

 * commons:Category:Flags with three horizontal stripes of black, pink and white color combination‎

Black, white, black

 * commons:Category:Flags with three horizontal stripes, one white, two black‎
 * commons:Category:Flags with three vertical stripes, one white, two black

Black, white, yellow

 * commons:Category:Flags with three horizontal stripes of black, white and yellow color combination‎

White, black, white

 * commons:Category:Flags with three horizontal stripes, one black, two white

Black and yellow
Yellow cross:
 * commons:Category:Horizontal bicolor black and yellow flags
 * commons:Category:Vertical bicolor black and yellow flags‎

Black, yellow, black

 * commons:Category:Flags with three horizontal stripes, one yellow, two black‎
 * commons:Category:Flags with three vertical stripes, one yellow, two black

Yellow, black, yellow

 * commons:Category:Flags with three horizontal stripes, one black, two yellow

Blue and green
Nordic cross:
 * commons:Category:Horizontal bicolor blue and green flags
 * commons:Category:Vertical bicolor blue and green flags

Blue, brown, green

 * commons:Category:Flags with three horizontal stripes of blue, brown and green color combination

Blue, green, red

 * commons:Category:Flags with three horizontal stripes of blue, green and red color combination
 * commons:Category:Flags with three vertical stripes of blue, green and red color combination‎

Blue, green, white
Green, white, blue:
 * commons:Category:Flags with three horizontal stripes of blue, green and white color combination
 * commons:Category:Flags with three vertical stripes of blue, green and white color combination‎

Blue, green, yellow
Green, yellow, blue:
 * commons:Category:Flags with three horizontal stripes of blue, green and yellow color combination
 * commons:Category:Flags with three vertical stripes of blue, green and yellow color combination

Blue and pink

 * commons:Category:Horizontal bicolor blue and pink flags

Blue and red

 * commons:Category:Horizontal bicolor blue and red flags
 * commons:Category:Vertical bicolor blue and red flags‎

Blue, red, blue

 * commons:Category:Flags with three horizontal stripes, one red, two blue‎

Blue, red, white
Blue, white, red, white, blue with device
 * commons:Category:Flags with three horizontal stripes of blue, red and white color combination‎
 * commons:Category:Flags with three vertical stripes of blue, red and white color combination

Blue, red, yellow

 * commons:Category:Flags with three horizontal stripes of blue, red and yellow color combination‎
 * commons:Category:Flags with three vertical stripes of blue, red and yellow color combination

Red, blue, red

 * commons:Category:Flags with three horizontal stripes, one blue, two red
 * commons:Category:Flags with three vertical stripes, one blue, two red‎

Blue and white
White cross:
 * commons:Category:Horizontal bicolor blue and white flags‎
 * commons:Category:Vertical bicolor blue and white flags‎

Blue, brown, white

 * commons:Category:Flags with three horizontal stripes of blue, brown and white color combination

Blue, orange, white

 * commons:Category:Flags with three horizontal stripes of blue, orange and white color combination
 * commons:Category:Flags with three vertical stripes of blue, orange and white color combination

Blue, white, blue
Two fictious countries:
 * commons:Category:Flags with three horizontal stripes, one white, two blue
 * commons:Category:Flags with three vertical stripes, one white, two blue‎

Blue, white, yellow
Nordic cross white, yellow, blue:
 * commons:Category:Flags with three horizontal stripes of blue, white and yellow color combination‎
 * commons:Category:Flags with three vertical stripes of blue, white and yellow color combination‎

White, blue, white

 * commons:Category:Flags with three horizontal stripes, one blue, two white

Blue and yellow
Yellow cross:
 * commons:Category:Horizontal bicolor blue and yellow flags
 * commons:Category:Vertical bicolor blue and yellow flags‎

Blue, orange, yellow

 * commons:Category:Flags with three horizontal stripes of blue, orange and yellow color combination

Blue, purple, yellow

 * commons:Category:Flags with three horizontal stripes of blue, purple and yellow color combination

Blue, yellow, blue
Nordic cross:
 * commons:Category:Flags with three horizontal stripes, one yellow, two blue
 * commons:Category:Flags with three vertical stripes, one yellow, two blue‎

Baarn (Netherlands) has both striped and crossed cousins

Yellow, blue, yellow

 * commons:Category:Flags with three horizontal stripes, one blue, two yellow‎
 * commons:Category:Flags with three vertical stripes, one blue, two yellow

Green and orange

 * commons:Category:Vertical bicolor green and orange flags

Green and red
Cross:
 * commons:Category:Horizontal bicolor green and red flags
 * commons:Category:Vertical bicolor green and red flags‎

Green, purple, red

 * commons:Category:Flags with three horizontal stripes of green, purple and red color combination

Green, red, green

 * commons:Category:Flags with three horizontal stripes, one red, two green‎

Green, red, white
Nordic cross green, white, red:
 * commons:Category:Flags with three horizontal stripes of green, red and white color combination‎
 * commons:Category:Flags with three vertical stripes of green, red and white color combination

Green, red, yellow

 * commons:Category:Flags with three horizontal stripes of green, red and yellow color combination
 * commons:Category:Flags with three vertical stripes of green, red and yellow color combination

Red, green, red

 * commons:Category:Flags with three horizontal stripes, one green, two red‎

Green and white
White Nordic cross:
 * commons:Category:Horizontal bicolor green and white flags
 * commons:Category:Vertical bicolor green and white flags

Brown, green, white

 * commons:Category:Flags with three horizontal stripes of brown, green and white color combination‎

Green, orange, white

 * commons:Category:Flags with three horizontal stripes of green, orange and white color combination‎
 * commons:Category:Flags with three vertical stripes of green, orange and white color combination‎

Green, pink, white

 * commons:Category:Flags with three horizontal stripes of green, pink and white color combination

Green, purple, white

 * commons:Category:Flags with three horizontal stripes of green, purple and white color combination‎
 * commons:Category:Flags with three vertical stripes of green, purple and white color combination‎

Green, white, green

 * commons:Category:Flags with three horizontal stripes, one white, two green
 * commons:Category:Flags with three vertical stripes, one white, two green‎

Green, white, yellow
Quartered per cross:
 * commons:Category:Flags with three horizontal stripes of green, white and yellow color combination‎
 * commons:Category:Flags with three vertical stripes of green, white and yellow color combination

White, green, white

 * commons:Category:Flags with three horizontal stripes, one green, two white‎
 * commons:Category:Flags with three vertical stripes, one green, two white

Green and yellow
Green cross:
 * commons:Category:Horizontal bicolor green and yellow flags‎
 * commons:Category:Vertical bicolor green and yellow flags‎

Green, orange, yellow

 * commons:Category:Flags with three horizontal stripes of green, orange and yellow color combination‎
 * commons:Category:Flags with three vertical stripes of green, orange and yellow color combination‎

Green, pink, yellow

 * commons:Category:Flags with three horizontal stripes of green, pink and yellow color combination

Green, yellow, green

 * commons:Category:Flags with three horizontal stripes, one yellow, two green
 * commons:Category:Flags with three vertical stripes, one yellow, two green‎

Yellow, green, yellow

 * commons:Category:Flags with three horizontal stripes, one green, two yellow‎

Grey and white

 * commons:Category:Horizontal bicolor grey and white flags‎

Maroon and white

 * commons:Category:Horizontal bicolor maroon and white flags
 * commons:Category:Vertical bicolor maroon and white flags‎

Maroon, white, maroon

 * commons:Category:Flags with three horizontal stripes, one white, two maroon

Orange and white
The third color of Hernandarias is maroon or purple?
 * commons:Category:Vertical bicolor orange and white flags

Purple and yellow

 * commons:Category:Horizontal bicolor purple and yellow flags
 * commons:Category:Vertical bicolor purple and yellow flags

Red and white
Nine stripes:
 * commons:Category:Horizontal bicolor red and white flags
 * commons:Category:Vertical bicolor red and white flags

Orange, red, white

 * commons:Category:Flags with three horizontal stripes of orange, red and white color combination

Red, white, red

 * commons:Category:Flags with three horizontal stripes, one white, two red‎
 * commons:Category:Flags with three vertical stripes, one white, two red‎

Red, white, yellow
Siblings:
 * commons:Category:Flags with three horizontal stripes of red, white and yellow color combination
 * commons:Category:Flags with three vertical stripes of red, white and yellow color combination‎

White, red, white

 * commons:Category:Flags with three horizontal stripes, one red, two white‎

Red and yellow
Centered cross:
 * commons:Category:Horizontal bicolor red and yellow flags‎
 * commons:Category:Senyeres
 * commons:Category:Vertical bicolor red and yellow flags

Purple, red, yellow

 * commons:Category:Flags with three horizontal stripes of purple, red and yellow color combination

Red, yellow, red
Nordic cross:
 * commons:Category:Flags with three horizontal stripes, one yellow, two red
 * commons:Category:Flags with three vertical stripes, one yellow, two red‎

Yellow, red, yellow

 * commons:Category:Flags with three horizontal stripes, one red, two yellow
 * commons:Category:Flags with three vertical stripes, one red, two yellow

White and yellow

 * commons:Category:Horizontal bicolor white and yellow flags
 * commons:Category:Vertical bicolor white and yellow flags

Orange, white, yellow

 * commons:Category:Flags with three horizontal stripes of orange, white and yellow color combination

Purple, white, yellow

 * commons:Category:Flags with three horizontal stripes of purple, white and yellow color combination‎

Yellow, white, yellow

 * commons:Category:Flags with three horizontal stripes, one white, two yellow

Blue, red, white, yellow
Horizontally striped

Diagonal divided flags
Bonaire, Maruri-Jatabe
 * Yellow, white, blue

Quartered flags
Numbers of directions: Blue, red, white, yellow
 * commons:Category:Orthogonal quartered flags
 * commons:Category:Diagonal quartered flags

Flags containing flag of Ulster
I am vexillographer myself. If you want to see my initial list-of-twins design, write a note to me. It was much different and even now it is not perfect. If you have proposlas for another change, write to me. Now you can see more my pages (list is at my Indonesian user page). sk:Redaktor:Hosmich id:Pengguna:Hosmich