Is there any way to correct the colors of the mail-categories? Now “red” is dark-red, “blue” is dark-blue, “green” is green, “orange” is red-brown, “violet” is even darker blue, “yellow” is brown. Colors on my pc are fine in other software.
You can go to Menu > Tools > Categories. Highlight the category you wish to change and then click on “Edit”. You can then change the color.