To help choose your colours, visit www.colourlovers.com/palettes
An excellent and FREE site with terrific search facilities to help you find a combination of colours to your taste. If you find a palette you like, be sure to note the name of the palette (and ideally it’s URL) in your submission and not the individual colours.
Another colour site worth a look at is Canva. Their Design Wiki on Colors
teaches you everything you need to know about colors, their meanings
and the color combinations that will hopefully give inspiration to
your site design!
Similarly www.texturelovers.com offers the same but for textures. Their library is still quite small but they do have great examples of how textures can be featured in a website. For one of the largest collections of textures online visit CG Textures. Again be sure to note the precise label of the texture you like to avoid losing it in the vast library.