[2020] Does Blizzard not have a single colorblind or poor sight employee?

I can't be in such a small minority that some of these dual class cards are really difficult to pick out. I can't tell the difference between hunter and demon hunter colours, I know there's only a small set of cards in those pools at present, but it would be good to have something implemented for the future releases. There must be many other individuals with similar colour/sight problems or annoyances, I've been playing since Karazhan but DH class releasing was the first time I realised I couldn't tell the difference between the greens. This game has been out for years, and I'm wondering why have Blizzard STILL not introduced a colour blind mode. They've managed it for other games!

Edit; I think some people are thinking that I'm requesting colorblind mode solely for the reason I highlighted. There are a myriad of sight problems that mostly I know nothing about and was surprised that there didn't appear to be a consideration, or other problems cropping up in this area. A few people have highlighted Kibler as another example, and while the things affecting people may not be considered game breaking, they would certainly go a long way to making the experience more enjoyable for some players, at the very low cost of most people not noticing differences. Cheers.