I've been a professional artist for twenty years. My preferred method of working is to place colors directly against each other without the safety net of hard,

I've been a professional artist for twenty years. My preferred method of working is to place colors directly against each other without the safety net of hard, high-contrast outlines to save me from the muddy pit of samey values. I have to be aware of this problem pretty much every day of my working life. I am curious how you think I could have said "dude you are making this so fucking hard on yourself by choosing to have next to no value contrast, here are some ways I regularly have to check that I'm not doing this by mistake, good luck figuring out how to get everything else so amazingly perfect that it overcomes this giant deliberate flaw" without sounding "arrogant".