Fallback to SGR when rendering 16/256 colors when MaxColors is 16M #4530
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When MaxColors is 16M, the "palette index" is treated by "setaf" as a true color, not the classic 256 color. Users of `PaletteIndex` expects 256 color and let's fallback to SGR.
For example, setaf on tmux-direct is:
setaf=\E[%?%p1%{8}%<%t3%p1%d%e38:2::%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%&%d%;m,
It only special treats the first 8 colors (which means `rgb(0,0,0..8)` cannot be rendered with `setaf`).
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When MaxColors is 16M, the "palette index" is treated by "setaf" as a true color, not the classic 256 color. Users of
PaletteIndexexpects 256 color and let's fallback to SGR.For example, setaf on tmux-direct is:
It only special treats the first 8 colors (which means
rgb(0,0,0..8)cannot be rendered withsetaf).Related: #4528