Text Outline Color
txt-line-color
Sets the color of the outline to draw around the text, if txt-line is set.
Valid color values are color keyword (opens in a new tab) or 3- (RGB), 4- (ARGB) 6- (RRGGBB) or 8-digit (AARRGGBB) hexadecimal colors. The "A" in a 4- or 8-digit hex value represents the color's alpha transparency. The default is opaque white, FFF.