PALETTE - mkilgore/QB64pe GitHub Wiki

The PALETTE statement can swap color settings, set colors to default or set the red, green and blue color components of palette colors.

PALETTE [attribute%,]

PALETTE [existingAttribute%,]

• red%, green% and blue% values can range from 0 to 63. Many color shades are possible in non-DAC color attributes.
• If the red%, green% and blue% color intensity settings are all the same value the resulting color is a shade of grey.
• A swap is often used with DAC color attributes that cannot change RGB settings. Only the RGB color settings are swapped from original existingAttribute% to newAttribute%. Screens 0 thru 9 support swaps. Screen 10 supports up to attribute 8 only.
• PALETTE without any value sets any changed RGB settings back to the default color settings, including DAC colors.
• PALETTE USING can be used when color intensity values are stored in an array.
• QB64 implements the _PALETTECOLOR statement to provide extended palette functionality.

• Screens 0, 7 and 9 (DAC) colors could not be changed using the first syntax, but the program could use OUT to change intensity settings of attributes 1 thru 5.

Example: Displaying all 64 DAC color hues as backgrounds in SCREEN 9 using a PALETTE swap.

 '' ''
  SCREEN (statement) 9 ' background is default black
  LOCATE 20, 33: PRINT "Press any Key!"  
  FOR...NEXT i = 0 TO 63
   a$ = INPUT$(1) ' wait for a keypress
   PALETTE 0, i
  NEXT '' ''

Note: Other attributes (1 to 15) can also be swapped for DAC foreground colors.

• _PALETTECOLOR
• PALETTE USING
• COLOR
• OUT, INP
• SCREEN