Tweaking colors is one of my favorite things to do with website themes. The cool thing about having a basic background or header theme picture is the opportunity to customize the color scheme based on the actual hues in the visual (I use Gimp, a free, open-source photo editor—think Photoshop—as my tool to find colors). Works very well with my cosmology-themed sites in particular, although I have to be wary about getting carried away with too many accent colors.
Quite a bit of thought and internal debate go into every color analysis; not every shade will do for every purpose (accents, hyperlinks, backgrounds, borders), and I do try to keep the three-color palette guideline in mind (as much as I love purple….).
In this site, I’ve chosen my colors based on the NGC1097 galaxy you see in the main image. The darkest version of black becomes the text color, the paler peaches and pinks serve as backgrounds and borders for darker areas, and the more saturated pinks as borders on light/white backgrounds. The gray/blues in the image work for links and button colors, although I’ve used pink for some of the link colors with darker backgrounds. So, blue, pink/peach, and white/black form the main palette.
I’d love to know what color combos you like to work with most or see on your site. And do let me know if you’d like me to “translate” your favorite header image or logo colors into a theme for your site. 🙂