When used ANSI color to both of the text color and background, the content may be inaccessible color depending on the terminal theme choosed by the user. If the terminal was supported 256 colors and more, Marp CLI tries to use a specific color instead of ANSI colors. If not, fallback to simple color inverse ESC[48m.
When used ANSI color to both of the text color and background, the content may be inaccessible color depending on the terminal theme choosed by the user. If the terminal was supported 256 colors and more, Marp CLI tries to use a specific color instead of ANSI colors. If not, fallback to simple color inverse
ESC[48m
.Fix #552.