This is a black and white photo with colored lines added. Zoom in to see the lines. Your brain fills in the rest.
@Tedgarrison3 @trinsec same for me on my iMac but works on the much smaller screen on my iPhone.
@rdaily
Yup, on my phone I'm starting to see the reds as well. But at that point it means the colored squares are a lot smaller, thus it's easier to fill in the blanks that way.
If the colored squares were the same size from the phone when displayed on a big monitor, it'd fill in the blanks better too. At that point you might as well just actually color the actual photos. ;)
@trinsec may also have to do with the monitor used to view, size of image, etc. or just less effective for some colors...