I am a fan of super simple blogs. You can check out the design I did for the Weekend File & this DIY blog design to see what I mean. If you're not a fan of creating a color palette or perhaps you just can't settle consider going the route of a pop of color. Take the DIY blog design up a notch with a cool Caribbean blue or a lovely yellow. (You could even use a fun font instead of the Serif one I used to make it more playful!) One color can do it if you throw in a few shades of gray for text & links.
Here are some solid colors I'm loving:
Here's how the My New Life DIY Blog Design would look with a pop of color & a cursive font: