9 Color Helpers

8.9

9 Color Helpers

procedure
(red pict) → pict?
  pict : pict?
procedure
(orange pict) → pict?
  pict : pict?
procedure
(yellow pict) → pict?
  pict : pict?
procedure
(green pict) → pict?
  pict : pict?
procedure
(blue pict) → pict?
  pict : pict?
procedure
(purple pict) → pict?
  pict : pict?
procedure
(black pict) → pict?
  pict : pict?
procedure
(brown pict) → pict?
  pict : pict?
procedure
(gray pict) → pict?
  pict : pict?
procedure
(white pict) → pict?
  pict : pict?
procedure
(cyan pict) → pict?
  pict : pict?
procedure
(magenta pict) → pict?
  pict : pict?

These functions apply appropriate colors to picture p.

Example:

> (red (disk 20))

Added in version 1.4 of package pict-lib.

procedure
(light color) → color/c
color : color/c
procedure
(dark color) → color/c
color : color/c

These functions produce lighter or darker versions of a color.

Example:

> (hc-append (colorize (disk 20) "red")
(colorize (disk 20) (dark "red"))
(colorize (disk 20) (light "red")))

Added in version 1.4 of package pict-lib.

value
color/c : flat-contract?

This contract recognizes color strings, color% instances, and RGB color lists.

Added in version 1.4 of package pict-lib.

1	Pict Datatype
2	Basic Pict Constructors
3	Pict Combiners
4	Pict Drawing Adjusters
5	Bounding Box Adjusters
6	Pict Finders
7	More Pict Constructors
8	Animation Helpers
9	Color Helpers
10	Shadows
11	Conditional Combinations
12	Tree Layout
13	Miscellaneous
14	Rendering
15	Conversion to Picts