New to crochet colourwork? We have a tutorial here:
http://thecrochetproject.com/blog/how-to-work-crochet-colourwork

With simple striking colour work and mitts to match, the Newnham Hat is sure to please.

Sizes
S (M, L)
To fit head measuring: 48 (53, 58)
cm/19 (21, 23)in
Materials
1 (1, 1) 50g ball Blacker Pure Shetland
4ply in Very Dark - Col A
1 (1, 1) 50g Blacker Pure Shetland 4ply
in Fawn – Col B
3.5mm (US E) hook.

Tension
20 sts and 18 rows in double crochet (US single crochet) in the back loop only to 10 cm/4 in using 3mm hook (or size needed to achieve tension)

Difficulty Rating
Easy

Skills Needed
Basic crochet stitches, working in the back loop only, decreasing, working from a colour work chart, changing colour, working with two colours.

Construction
Worked from the brim up, first in zig zag ribbing in
rows, then joined in the round to work the colour charts. Decreases are worked at the crown in single colour