Set the foreground color attribute.
These attributes set the bright named colors. The black color is a grey darker than the non bright "white".
In practice these colors can be customized or selected from a theme in most terminals. The exact values can vary wildly.
🛈 With the vgacon driver bright foreground colors are only available when using a 256 glyph font. When using 512 glyph fonts and the vgacon driver this is an alias for the non bright foreground colors. 🛈 linuxvc uses a unified intensity model where brigth colors use an intensity of 2. Intensity is shared with bold and faint. Reset value for intensity is 1.