One challenge with these cards was making sure the element cards and tile cards look different enough that they would not be easily confused with each other. To that end, the card borders are ‘made’ of different materials – paper for the element cards and stones for the tile cards. The backs have very distinct patterns.
Another challenge was creating icons that are clear and distinguishable for people with low vision. When designing them, I would frequently step away from my computer to check if they were clear from a distance. I also used an adjustment layer in photoshop to check if the cards remained clear in grayscale, for people with colorblindness.