Samsung UN46ES7500FXZA E-Manual page 224

Style0 to Style7. The default is Style0.
Font Color: You can change the color
of the letters.
Options include Default, White, Black,
Red, Green, Blue, Yellow,
Cyan. The default is White.
Background
the background color of the captions.
Options include Default, White, Black,
Red, Green, Blue, Yellow,
Cyan. The default is Black.
Color: You can change
Magenta
Magenta
and
and