I have completed the first section of the
Learn to Knit afghan [book], knit & purl combinations, and have done two squares from the mosaic section. The author suggests that you use four colors - 2 dark & 2 light - but I went a little yarn
crazy happy in a yarn store, so I had more than 4 colors and not really enough of any of them (28 oz each of the light and 12 oz each of the dark) to use only four colors. I know myself well enough that if I went back to the LYS "to buy more of the colors I had already chosen" I would have come away with WAY TOO much yarn (yes, I am a yarn addict, how did you guess?).
The solution? A jewel-toned afghan with using most of the Patons
Classic Merino I purchased. The colors (always subject to addition - I am now back in CT with access to my knitpicks yarn) are:
- Aran (cream/off-white)
- Burgundy
- Bottle Green
- Navy
- That's Blue
- That's Purple
- Royal Purple
- Peacock
The pictures:
I. First section (knit-purl combinations)

Back row (or top?): Garter & Rib (7) in bottle green, Striped Stockinette (2) in aran & bottle green; Middle row: Basketweave (3) in burgundy, Diagonal rib (5) in aran, Rose fabric (8) in burgundy & nvay; Bottom row: Twisted & Crossed rib (6) in that's purple, Lattice with seed stitch in that's blue, Striped garter in aran & navy.
II. Mosaic patterns

Left: Horizontal chain (9) in peacock & navy
Right: Diagonal chain (10) in aran & royal purple
Both squares are much richer in color but the flash washed them out.