Edit gui's fixed text color is unreadable in high contrast theme

[Ranran]

For example, the monument color is set to COL_BLACK, but the high contrast theme is unreadable because it has a black background.
This was the same for extended, so I created a first aid patch to fix it.
As with the player color, the brightness can be changed by setting the theme. The color may change slightly from before. Still, blue can be difficult to read. That's because the original blue player color has such a problem.
This is because, as pointed out earlier, there is no rule in the gradation of the player color, and dark colors continue(ex, in blue), suddenly brighten(ex, in gray), or sometime the same color continues (ex, in orange).

[Dwachs]

thank you, in r9674