Solarbird 
the amount of struggle I had to go through to get an even vaguely colour-accurate photo of this piece of paper on my iPhone 11 is honestly kind of crazymaking.
Here's what it looked like before I worked on it. THIS WAS THE BEST ONE I GOT.
I don't know what the fuck the phone thinks it's seeing but it's not what I see and _I_ see _ultraviolet_. WTF, phone.
What I made still isn't right but at least gets the idea across - to show how much shift I'm able to get out of the cheap oversized printer at the UPS Store in Kenmore.
The physical print will let me create a pre-mixed special edition MEGAMAP which can be printed on that printer in that shop and come out reasonably accurate.
ANYWAY MUCH LATER
It's kinda weird! The amount of contrast has a real effect on the colour balance too on this printer. Not sure what's up with that.
+1/8 red +25% contrast for example gives me arguably good enough visibility on the Seattle non-bike streets, though I'd like slightly more. But the Greater Northshore proper background is a little too red and also still kinda light.
Then jumping to +50% contrast at 1/8 red somehow _corrects the colour balance in the land_. I don't know how that's happening. Unfortunately, it blows out the text a little, and makes the water more purple than I want - meaning that the red goes down in the land while increasing in the lake.
Meanwhile the closest to correct water colour is base tint +50%, which is still too green everywhere else.
Basically, this is a weird printer.
I think I'm gonna try +1/8th on the red - maybe just a little shy of that - and +35 to 40% on the contrast. I really like how the non-bike-streets show up really clearly above +25% and I want to see how much of that I can retain _without_ starting to blow out the dark grey text.