So, you're asserting that the color choice of the bubbles ten years ago was unintentional? That whatever developer coded it had no instruction, Jony Ive & Steve Jobs were silent, and they used a random number generator to pick the hex code?
And additionally, you're asserting that its impossible to change or improve? That its just such an intractable problem which we inherited, and changing it would be such a herculean effort that its not worth moving the needle on?
I've never seen the codebase for the iOS messages app. I believe, even acknowledging that, its probably an absolute mess of legacy code, and I have a ton of sympathy for the developers working on it. I also believe, even acknowledging that, that changing one color is something an intern could do (and because its a big tech product org, there'd be fifty user studies and three orgs of product managers involved and Tim Cook would get a say in it, but those are manufactured problems. Also, let's be clear; if Jobs were still alive & in control, even all those manufactured roadblocks would be torn down, if it were a change he cared to prioritize, because that's the kind of leader he was).
Inaction is Intentional. Inaction is Intentional. Inaction is Intentional.