Just for future reference, it won’t, don’t worry. I’ve seen threads run for thousands of posts after an answer was chosen. But yeah, by all means leave that ‘answer’ spot vacant. It might encourage more people to share information, and you or someone else might find it helpful.
The irony of it all is that I literally meant it just for matching the colours to their meanings, not kanji readings. Glad that worked out somehow. Hahaha. However, yeah, when you’re differentiating on’yomi from kun’yomi, reading length is a factor. I went looking for some of my past answers on this, and I think this is the most complete one:
I don’t think a kun/on classification is going to match the vocabulary/kanji classification perfectly, but maybe it’ll still be helpful.
Either way, all the very best, really. I hope you start to see improvement soon.