setalpha

Description:

setalpha

setalpha #
A convenience package for setting and accessing web colors, adjusting
the alpha levels of given colors and mixing new colors.
Demos #

Color Breakdown

A little app that demonstrates color manipulation, component data,
finding similar colors and setting alpha levels using setalpha.

Falco Shapes

A little combinatorics game based on Marsha Falco's game of Set;
setalpha was used to color the pieces on the board.
Usage #
Simple usage examples:

Conveniently get properties of a color.

final ps = ColorProperties(Color.cornflowerBlue);
print("""
Color: $ps

Red: ${ps.red}
Green: ${ps.green}
Blue: ${ps.blue}
Alpha: ${ps.alpha}
Chroma: ${ps.chroma}
Hue: ${ps.hueInDegrees}
Intensity: ${ps.intensity}
Lightness: ${ps.lightness}
Saturation: ${ps.saturation}
""");
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Color: #6495EDFF

Red: 100
Green: 149
Blue: 237
Alpha: 1.0
Chroma: 0.5372549019607844
Hue: 218.54014598540147
Intensity: 0.6352941176470589
Lightness: 0.6607843137254902
Saturation: 0.7919075144508672
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Also works with hex, rgb, rgba, hsl, hsla expressions:

// Change the color the ColorProperties instance points to...
ps.color = "rgba(50,150,200,0.75)";
print("""
Color: $ps

Red: ${ps.red},
Green: ${ps.green}
Blue: ${ps.blue}
Alpha: ${ps.alpha}
Chroma: ${ps.chroma}
Hue: ${ps.hueInDegrees}
Intensity: ${ps.intensity}
Lightness: ${ps.lightness}
Saturation: ${ps.saturation}
""");
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Color: #3296C8BF

Red: 50,
Green: 150
Blue: 200
Alpha: 0.7490196078431373
Chroma: 0.5882352941176471
Hue: 199.99999999999997
Intensity: 0.5228758169934641
Lightness: 0.49019607843137253
Saturation: 0.6000000000000001
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Get cornflowerblue with an alpha value of 0.5.

print(setAlpha(Color.cornflowerBlue, 0.5));
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#6495ED80
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Also works for other hex and hsl expressions...

print(setAlpha("#6495ED", 0.5));
print(setAlpha("hsl(218.54deg, 79%, 66%)", 0.5));
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#6495ED80
#6495ED80
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Which web colors are nearest cornflourblue in RGB-space?

for (final neighbor in colorsNearestRGB(Color.cornflowerBlue, 3)) {
print(neighbor);
}
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cornflowerblue
mediumslateblue
royalblue
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... and in HSL-space?

for (final neighbor in colorsNearestHSL(Color.cornflowerBlue, 3)) {
print(neighbor);
}
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cornflowerblue
royalblue
skyblue
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Let's mix 3 parts cornflowerblue with 2 parts maroon...

print(colorMix([Color.cornflowerBlue, Color.maroon], [3, 2]));
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#6F598EFF
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Features and bugs #
Please file feature requests and bugs at the issue tracker.