{"id":6304,"date":"2020-04-12T12:28:27","date_gmt":"2020-04-12T19:28:27","guid":{"rendered":"http:\/\/www.terryaskeartquilts.com\/Studio\/?p=6304"},"modified":"2020-04-12T14:46:09","modified_gmt":"2020-04-12T21:46:09","slug":"optical-illusions-dont-believe-your-eyes-2020-04-12","status":"publish","type":"post","link":"https:\/\/www.terryaskeartquilts.com\/Studio\/2020\/04\/12\/optical-illusions-dont-believe-your-eyes-2020-04-12\/","title":{"rendered":"Optical illusions. Don’t believe your eyes – 2020.04.12"},"content":{"rendered":"\n

As I said in an earlier post, primary colors are not my favorite colors. And yet here I am making quilts for a primary colors challenge. When I first read about the Canadian Quilters Try-A-Triad Challenge<\/a>, my first thought was how I could make my entry look like the colors were different than all the other entries. <\/p>\n\n\n\n

I have recently been reading about optical illusions, including the Bezold effect and the Munker-White illusion. If you search for images<\/a> based on these words, you’ll find many examples. Most of the websites have lots of advertising (which irritates me, so I’m not going to link to them!) but here’s one website<\/a> that explains the effects and shows a really good example. Edited to add<\/em>: here’s another great website<\/a>, and there are many more optical illusions to entertain you.<\/p>\n\n\n\n

I wanted to try this with the primary color fabrics, but first I experimented using Excel and the Fill Color tool. On the left, the 2 squares are the same red, although they look different depending on what color stripes are adjacent to the red. In the middle, the 2 yellow squares are the same yellow. On the right, you can see the 2 red columns are actually the same red.<\/p>\n\n\n\n