Modifies a palette color entry (OSC 4) (ESC ] 4 ; i ; rgb:rr/gg/bb ST).
ESC ] 4 ; i ; rgb:rr/gg/bb ST
public static TerminalInstance SetPaletteColor(int index, byte r, byte g, byte b)
The palette index to modify.
Red component.
Green component.
Blue component.