This article is full of amazing resources for choosing a palette for your web app. In addition to the subtle palette shown above, they show 19 more examples from “Sites of the Day” chosen by aWWWards.
And that’s not all! Below the 20 inspiring examples, the article links to a bunch of free online tools for choosing and combining colors. For example, 0 to 255 lets you enter one color and see a huge sample of lighter and darker shades of that color.
If you’re having trouble wrapping your mind around hexadecimal codes for color, watch this 4-minute video:
Last but not least: When choosing text colors, always make sure they have enough contrast against your background color to make reading the text easy. If you have any doubt about it, you can check the level of contrast here to make sure it’s good enough.