macOS Color Picker
After trying many apps, my favorite macOS color picker remains the built in utility.
Source: macOS Color Picker, an article by Paco Coursey.
Promise of Blood: very good
In the early evening I finished Promise of Blood, book 1 in the Powder Mage trilogy by Brian McClellan. I liked this book a lot; it's very good. In some ways it reminded me of the Mistborn Book Series by Brandon Sanderson, especially the later books. If you have read this series you might like Promise of Blood a lot, and vice versa.
The Crimson Campaign
Tamas' invasion of Kez ends in disaster when a Kez counteroffensive leaves him cut off behind enemy lines with only a fraction of his army, no supplies, and no hope of reinforcements. Drastically outnumbered and pursued by the enemy's best, he must lead his men on a reckless march through northern Kez to safety, and back over the mountains so that he can defend his country from an angry god, Kresimir.
In the evening I started in The Crimson Campaign, book 2 in the Powder Mage trilogy by Brian McClellan.