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46 lines
1.8 KiB
Markdown
46 lines
1.8 KiB
Markdown
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The [PALETTE](PALETTE) statement can swap color settings, set colors to default or set the red, green and blue color components of palette colors.
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## Syntax
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> [PALETTE](PALETTE) [attribute%, *red%* + (*green%* * 256) + (*blue%* * 65536)]
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> [PALETTE](PALETTE) [existingAttribute%, newAttribute%]
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## Description
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* red%, green% and blue% values can range from 0 to 63. Many color shades are possible in non-[DAC](DAC) color attributes.
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* If the red%, green% and blue% color intensity settings are all the same value the resulting color is a shade of grey.
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* A swap is often used with [DAC](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.
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* PALETTE without any value sets any changed RGB settings back to the default color settings, including [DAC](DAC) colors.
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* [PALETTE USING](PALETTE-USING) can be used when color intensity values are stored in an [Arrays](Arrays).
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* QB64 implements the [_PALETTECOLOR](_PALETTECOLOR) statement to provide extended palette functionality.
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## QBasic
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* Screens 0, 7 and 9 ([DAC](DAC)) colors could not be changed using the first syntax, but the program could use [OUT](OUT) to change intensity settings of attributes 1 thru 5.
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## Example(s)
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Displaying all 64 DAC color hues as backgrounds in SCREEN 9 using a PALETTE swap.
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```vb
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SCREEN 9 ' background is default black
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LOCATE 20, 33: PRINT "Press any Key!"
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FOR i = 1 TO 64
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a$ = INPUT$(1) ' wait for a keypress
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PALETTE 0, i
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NEXT
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```
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> *Note:* Other attributes (1 to 15) can also be swapped for DAC foreground colors.
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## See Also
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* [_PALETTECOLOR](_PALETTECOLOR)
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* [PALETTE USING](PALETTE-USING)
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* [COLOR](COLOR)
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* [OUT](OUT), [INP](INP)
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* [SCREEN](SCREEN)
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