I re-order colors by luminance, maybe you can do better. CGA palette by Trelemar.
Re-ordered palettes for use in config.lua:
local VIC20 =
"000000".."772d26".."42348b".."a85fb4".."b66862".."7e70ca".."a8734a".."559e4a"..
"e99df5".."e9b287".."bdcc71".."85d4dc".."92df87".."c5ffff".."ffffb0".."ffffff"
local CGA =
"000000".."aa0000".."0000aa".."555555".."aa5500".."00aa00".."ff5555".."aaaaaa"..
"5555ff".."aa00aa".."00aaaa".."55ff55".."ff55ff".."55ffff".."ffff55".."ffffff"
local SLIFE =
"000000".."122615".."3f2811".."7a2222".."513155".."d13b27".."286fb8".."5d853a"..
"cc8218".."e07f8a".."9b8bff".."68c127".."c7b581".."b3e868".."a8e4d4".."ffffff"
local JMP =
"000000".."191028".."833129".."453e78".."216c4b".."dc534b".."7664fe".."d365c8"..
"46af45".."e18d79".."afaab9".."d6b97b".."9ec2e8".."a1d685".."e9d8a1".."f5f4eb"
local CGARNE =
"000000".."2234d1".."5c2e78".."8a3622".."5e606e".."0c7e45".."e23d69".."aa5c3d"..
"4c81fb".."44aacc".."eb8a60".."b5b5b5".."6cd947".."7be2f9".."ffd93f".."ffffff"
local PSYG =
"000000".."1b1e29".."003308".."362747".."084a3c".."443f41".."a2324e".."52524c"..
"546a00".."736150".."64647c".."516cbf".."77785b".."e08b79".."9ea4a7".."cbe8f7"
local EROGE =
"0d080d".."2a2349".."4f2b24".."7d3840".."32535f".."825b31".."4180a0".."c16c5b"..
"c59154".."7bb24e".."74adbb".."e89973".."bebbb2".."f0bd77".."fbdf9b".."fff9e4"
local EISLAND =
"051625".."794765".."686086".."567864".."ca657e".."868691".."8184ab".."cc8d86"..
"7ea788".."39d4b9".."8dbcd2".."9dc085".."edc38d".."e6d1d1".."f5e17a".."f6f6bf"