The best way to get colors you like is to pick a photograph of the Doctor that includes all seven colors in the scarf and use it to compare. The later scarf (18th Season) is made of less colors and is in a different pattern.
Don't take these patterns as gospel, however. The first scarf was made because somebody kept sending yarn to a knitter and she thought they wanted a long scarf. Any arrangement of colors and blocks can work, it is safe to be creative.
Sous Chef - Emerald City Androgums
1 once (25 gram) balls of double knitting wool as follows:
The tassels are made from 1 foot lengths of wool. With seven tassels on each end and each tassel combining all 7 colors.
Chain 12 inches across using scarf pattern color (purple)
Chain 2 more then turn and single crochet in the third chain.
Single crochet one row, chain two, turn, single crochet.
Crochet number of rows (after chain) as in scarf pattern.
When you chain two, sometimes you will get a loop (not a smooth edge); experiment, you might want to chain one where it says chain two!
Remember a thinner yarn will take ages longer to knit.
Materials: In chunky yarn: 3 X 50gm balls of cream; 4 X 50gm balls of dark brown; 3 X 50gm balls of brick; 2 X 50gm balls of beige; 2 X 50gm balls of grey; 2 X 50gm balls of maroon; 2 X 50gm balls of rust. 1 pair of size 3 (6 1/2mm, US size 10) needles.
Notes: Always measure the scarf under slight tension, as it will drop and become longer when finished.
Work the colour change rows onto the same side so that the scarf has a wrong side. To do this, always join in all new colours at the same edge of the scarf.
Tension: 14 stitches. and 20 rows = 4in (10cm) on size 3 (6 1/2mm, US size 10) needles in stocking stitch. The whole scarf is worked in garter stitch i.e. all knit throughout.
Measurements: Approx. 12in (30cm) wide and 124in (315cm) long.
To Make: Using grey, cast on 42 stitches.
Work the following colour sequence in garter stitch (every row knit):
To fringe the scarf: Cut about 20 pieces of yarn in each of the seven colours, all about 12 in (30cm) long. Push a large crochet hook through the scarf from front to back, one row away from the end and behind the edge stitch. Take three of the 12in (30cm) lengths of yarn together and double them in the middle to form a loop. Place these looped threads together over the hook and pull them through to the front of the scarf. Pass all six fringe ends through the loop and pull them tight. Repeat this with further bunches of three pieces of yarn chosen at random from the seven colours, and do so in every alternate stitch of the first row away from the edge. Trim any extra long ends.