To go with the pack of twelve Kofu Tsumugi fat quarters for creating a sashiko version of a 'temperature quilt', these five extra colours can be used to extend the lower ranges of the colours, although the lilac 2504 could be used after bright purple 2513 to extend the top of the temperature range instead. The navy grey 2512 shades beautifully from deep blue purple 2508 (the 'coolest' colour in the other pack) into the other two greys, the reddish grey (pink) 2511 and then the lilac 2504. Combined with the pack of twelve fabrics, you would have a range of 17 colours to shade through, so you could use one colour for 2ºC increments and cover 34ºC in range, which woud probably be enough for UK daytime temperatures, even including heatwaves!

There is a 15% discount off the price of buying these fat quarters individually.

How do you work out the colours for a temperature quilt? You could record the daily high and low temperature yourself, or take the information from online weather forecast sites like accuweather.com which has historical temperature records for many locations worldwide. temperature-blanket.com is very helpful, including more links to historical temperature records but also having visualisation tools where you can choose colours (from knitting yarn swatches), temperature increments, and a blanket/quilt generator so you can get an impression of how your quilt is going to look. Of course, if you think the temperature range where you live isn't very dramatic (ours isn't!), you can always use a different location. I'm planning to make mine using the temperatures from Shōnai, Japan, where I used to live, which is warmer in summer than Perthshire!

Colours in this pack  are (cool to cold) - navy grey 2512, dark gray 2509, silver grey 2510, reddish grey (pink) 2511, and lilac 2504.  Depending on the temperature variation where you live, you may need a little extra of some colours, but these can be purchased as individual fat quarters or as 30 x 35cm precuts.
Kofu Tsumugi is a richly coloured yarn dyed tsumugi cotton fabric from Olympus Thread Mfg. Co., good for sashiko, patchwork, bag making and other projects.  It is the same fabric used for my pre printed sashiko panels. The coloured warp and black weft gives this fabric a deep colour, with little slubs to add texture and character.  The weave is loose enough to easily stitch sashiko with fine or medium sashiko threads but close enough to be able to do quite fine patchwork piecing. Ideal for wearables, furoshiki wrapping cloths etc.
 
Twelve 50 x 55cm fat quarters
 
100% cotton
 
Made in Japan by Olympus Thread Mfg. Co.

NB - available by the individual quarter metre, half metre, and metre. Many colours also available as 30 x 35cm pieces.