Hyperbolic orange: https://en.wikipedia.org/wiki/Impossible_color
Also, #FF9933—my favorite ink color—, and #B12FF2. I’d include samples in the post if I knew how.
I used TrueCrypt for years on both Windoze and Linux and migrated to VeraCrypt with no problems. I have also used LUKS, but I found it harder to set up and more brittle—it didn’t “just work” across updates (Gentoo) a few times. I have no idea about the relative security of VeraCrypt and LUKS. My problems with LUKS were > 5 years ago, so things have likely improved.