[Demonskid]

Actually there is a spot in the rules where it says

Text Color and Size: For the sake of users with visual difficulties, all text must be readable. Using colors that contrast poorly with the background color or very small font sizes is prohibited for post body text. These colors and sizes are permitted for effect for small portions of text but may not be used to conceal content that would be otherwise prohibited.

so if someone does have trouble seeing the text, it may be too light.