I know you can't control the colors used by whoever uses your theme, but please consider offering fewer / more distinct colors. R/g colorblindness affects around 5-10% of males depending on region, which depending on your market, can be a huge subset. The default colors you're offering, if used together, are not distinct enough to be told apart. [1] This is not an easy problem to "fix", however, but generally limiting the number of colors and trying to make sure they are outside of the most common color blindness ranges [2].
Of course, the onus is on the designer using your templates; not you, but I always feel this information is relevant when discussing design themes.
Comments
I know you can't control the colors used by whoever uses your theme, but please consider offering fewer / more distinct colors. R/g colorblindness affects around 5-10% of males depending on region, which depending on your market, can be a huge subset. The default colors you're offering, if used together, are not distinct enough to be told apart. [1] This is not an easy problem to "fix", however, but generally limiting the number of colors and trying to make sure they are outside of the most common color blindness ranges [2].
Of course, the onus is on the designer using your templates; not you, but I always feel this information is relevant when discussing design themes.
[1] http://imgur.com/a/CuDiw
[2] http://en.wikipedia.org/wiki/Color_blindness#Epidemiology