Claude Code terminal theme fix: Klein blue legibility via two-slot split

A developer created a terminal theme for Claude Code using Yves Klein's IKB blue, but found the pure pigment failed APCA contrast at Lc -12 for text. The fix splits the color into two slots: pure IKB for decorative elements and a lifted blue for readable permission prompts. The theme is available on GitHub and requires Claude Code set to dark-ansi mode.