BIOS color attribute list for Hex Editor v7.7a:

INT 10 - VIDEO - WRITE CHARACTER AND ATTRIBUTE AT CURSOR POSITION
 AH = 09h
 AL = character to display
 BH = video page number
 BL = attribute (text mode) (See Table #00014)
 CX = number of times to write character

(Table #00014)
Bitfields for character's display attribute:
 Bit(s)  Description
  7      Foreground Blink
  6-4    Background Color (See Table #00015)
  3      Foreground Bright
  2-0    Foreground Color (See Table #00015)

(Table #00015)
Values for character color:
 Bin  Dec  Normal      Bright
 ---  ---  ------      ------
 000   0   Black       Dark Gray
 001   1   Blue        Light Blue
 010   2   Green       Light Green
 011   3   Cyan        Light Vyan
 100   4   Red         Light Red
 101   5   Magenta     Light Magenta
 110   6   Brown       Yellow
 111   7   Light Gray  White

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