One of the nice things about winter is that I get a chance to work through some of the stash that has built up over the course of my crochet year, and making scarves for charity is probably my favourite way to do this.
These ones are made in: Stylecraft Batik Elements Platinum (1935) with Debbie Bliss Rialto Lake (23086) and Sea Green (23081); King Cole Drifter Utah (1358) with Rowan Wool Cotton Smalt and Skipper; and King Cole Drifter Kansas (1373) with too many scraps to remember!
My general strategy is to put together 100g of scrap yarn, choose a variegated yarn in co-ordinating colours and make a 30 stitch wide scarf in (UK) double crochet alternating between the scrap and variegated colours every two rows. The variegated yarn is a constant throughout the scarf, and the scrap colours are changed every 2, 3 or 5 stripes depending on what proportion of each colour I have available. You might notice that there are little loops of yarn being carried over going along one side of the scarf, which cuts down on the weaving in of ends considerably and makes the scarf no less warm or cosy.