struct TCal::Color

Overview

An RGB color value.

t_cal/color.cr

.new(red : UInt8, green : UInt8, blue : UInt8)
.new(rgb : String)
Initialize from a case-insensitive "RRGGBB" hex string.
.new(value : JSON::PullParser)
Deserialize from JSON, assuming an RGB hex string as used in the V3 API.

#blue : UInt8
#distance_from(other : self) : Float
Returns the perceptual distance between this color and another.
#green : UInt8
#red : UInt8
#to_css : String
Convert to a CSS color value.
#to_ical : String
Convert to an iCal COLOR value.

def self.new(red : UInt8, green : UInt8, blue : UInt8) #

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def self.new(rgb : String) #

Initialize from a case-insensitive "RRGGBB" hex string.

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def self.new(value : JSON::PullParser) #

Deserialize from JSON, assuming an RGB hex string as used in the V3 API.

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def blue : UInt8 #

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def distance_from(other : self) : Float #

Returns the perceptual distance between this color and another. Uses the "redmean" algorithm: https://www.compuphase.com/cmetric.htm

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def green : UInt8 #

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def red : UInt8 #

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def to_css : String #

Convert to a CSS color value.

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def to_ical : String #

Convert to an iCal COLOR value.

The standard only allows expressing colors as CSS3 color names, so the conversion is not exact. The "closest" color by #distance_from is used.

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