Pansexuality flag or Pansexual pride flag. Three horizontal stripes of color, from the top: pink, yellow, light blue.
The meaning of the color striped is widely considered as follows: the blue portion of the flag represents those who identify as male (regardless of biological sex), The pink represents those who identify as female (regardless of biological sex), and the yellow portion, found in between the blue and pink portions, represents those who identify as both genders, neither gender, or a third gender; such as genderqueer and agender. The yellow also represents non-binary attraction between the male and female genders.

The authors of the flag have had a slightly different interpretation: the pink and the blue respectively represent the "female spectrum" and the "male spectrum" of the usual gender binary; the yellow represents non-binary attraction, as well as "life and happiness".
Web archive of pansexualflag.tumblr.com [1] ; [2]
This SVG version: KiwiNeko14. Original idea: Tumblr blog PansexualFlag.