This yarn just really intrigued me and I had to bring it in -- these are just plain fun!
Abracadabra by HiKoo is a yarn that changes color when exposed to the sun!
Made up of 35% Superwash Merino, 50% Polypropylene, 15% Nylon with 100 yards per 50 gram hank, this is essentially a sport/ DK weight yarn that on US 4-6 needles (3.5-4.0 mm needles) will give you roughly 5.5-6 sts per inch.
All it takes is UV light. Sunlight is the most obvious and easiest, of course.
We brought in three of the four color possibilities.
#720 changes to pink (a rose)
#721 changes to purple (a soft ilac-ish)
#722 changes to blue (sky blue)
#723 changes to yellow.
So these all look like white in regular indoor lighting. Take them outside and....wow! They start almost right away to gradually change.
There is a free hat pattern available here.