Example:

assert $colFuchsia == "#FF00FF"

Adds two colors.

This uses saturated arithmetic, so that each color component cannot overflow (255 is used as a maximum).

Example:

var
  a = Color(0xaa_00_ff)
  b = Color(0x11_cc_cc)
assert a + b == Color(0xbb_cc_ff)

Subtracts two colors.

This uses saturated arithmetic, so that each color component cannot underflow (0 is used as a minimum).

Example:

var
  a = Color(0xff_33_ff)
  b = Color(0x11_ff_cc)
assert a - b == Color(0xee_00_33)

var
  a = Color(0xff_00_ff)
  b = colFuchsia
  c = Color(0x00_ff_cc)
assert a == b
assert not (a == c)

Example:

var
  a = Color(0xff_00_ff)
  b = Color(0x00_ff_cc)
type
  Col = range[0..255]
# assert extractRGB(a) == (r: 255.Col, g: 0.Col, b: 255.Col)
# assert extractRGB(b) == (r: 0.Col, g: 255.Col, b: 204.Col)
echo extractRGB(a)
echo typeof(extractRGB(a))
echo extractRGB(b)
echo typeof(extractRGB(b))

Example:

var
  a = Color(0xff_00_ff)
  b = Color(0x00_42_cc)
assert a.intensity(0.5) == Color(0x80_00_80)
assert b.intensity(0.5) == Color(0x00_21_66)

Example:

var
  a = "silver"
  b = "#0179fc"
  c = "#zzmmtt"
assert a.isColor
assert b.isColor
assert not c.isColor

Parses name to a color value.

If no valid color could be parsed ValueError is raised. Case insensitive.

Example:

var
  a = "silver"
  b = "#0179fc"
  c = "#zzmmtt"
assert parseColor(a) == Color(0xc0_c0_c0)
assert parseColor(b) == Color(0x01_79_fc)
doAssertRaises(ValueError): discard parseColor(c)

Example:

assert rgb(0, 255, 128) == Color(0x00_ff_80)

Uses fn to mix the colors a and b.

fn is invoked for each component R, G, and B. If fn's result is not in the range[0..255], it will be saturated to be so.

Example:

var
  a = Color(0x0a2814)
  b = Color(0x050a03)

proc myMix(x, y: int): int =
  2 * x - 3 * y

assert mix(a, b, myMix) == Color(0x05_32_1f)