LCHColor

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`LCHColor`

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LCHColor[l,c,h]

represents a color in the LCH color space with lightness l, chroma c and hue h.

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LCHColor[l,c,h,a]

specifies opacity a.

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LCHColor["string"]

returns a color from an HTML color name etc.

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LCHColor[color]

returns the LCH representation of color.

Details

LCHColor is a perceptual color space corresponding to a cylindrical transformation of LABColor with the a and b components represented in polar form in terms of c and h, allowing for easier interpretation of color parameters.

LCHColor is device independent and corresponds to the CIE color space with .
Components , and can be derived from , and parameters of LABColor:

		lightness, approximate luminance
		chroma, color saturation
		hue, cyclic color from red to green to blue

ColorConvert can be used to convert to and from other color spaces such as RGB and XYZ.
LCHColor allows any real number for l, c, and h.
If no opacity has been specified, LCHColor[l,c,h] is equivalent to LCHColor[l,c,h,1].
LCHColor[l,c,h,a] is equivalent to {LCHColor[l,c,h],Opacity[a]}.
The alternative forms LCHColor[{l,c,h}] and LCHColor[{l,c,h,a}] can also be used. »
RGBColor approximately corresponds to l between 0 and 1, c between 0 and 1.3, and h between 0 and 1.
The following wrappers can be used around colors:

	ColorsNear[color,…]	specifies a region around color
	Directive[…,color,…]	specifies a color in combination with other directives
	Glow[color]	specifies color independent of lighting »
	Opacity[a,color]	specifies a color with an opacity a »
	Specularity[color,…]	specifies the specularity color
	Style[expr,color]	displays expr with the specified color »

For 3D surfaces, explicit LCHColor directives define surface colors; the final shading depends on lighting and contributions from specularity and glow. »

Examples

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Basic Examples (4)Summary of the most common use cases

Specify the color of graphics primitives:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-bcuim0

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Specify the color with opacity:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-cs2gc0

Out[1]=1

Specify the output color of expressions:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-div9q5

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Specify the color of plots:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-dsfdek

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Scope (2)Survey of the scope of standard use cases

Colors in 3D (1)

Use diffuse surface color:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-tqvw

Out[1]=1

Use diffuse and specular surface color:

In[2]:=2

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https://wolfram.com/xid/0b8d3ibs3y-r009x

Out[2]=2

Use glow color, setting the diffuse surface color to black:

In[3]:=3

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https://wolfram.com/xid/0b8d3ibs3y-btxlaj

Out[3]=3

Color Operations (1)

Use Lighter and Darker to mix with white and black, respectively:

In[2]:=2

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https://wolfram.com/xid/0b8d3ibs3y-itv9hi

Out[2]=2

Generalizations & Extensions (2)Generalized and extended use cases

LCHColor[{l,c,h}] is equivalent to LCHColor[l,c,h]:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-hfzwvu

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Use Opacity with LCHColor:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-cyqzlb

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Use the opacity argument in LCHColor directly:

In[2]:=2

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https://wolfram.com/xid/0b8d3ibs3y-bhdjvo

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Applications (1)Sample problems that can be solved with this function

Perform a color desaturation by lowering the chroma while preserving luminance and hue:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-9cfi5z

In[3]:=3

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https://wolfram.com/xid/0b8d3ibs3y-o2r93s

Out[3]=3

Properties & Relations (2)Properties of the function, and connections to other functions

LCHColor is a cylindrical transformation of LABColor:

In[2]:=2

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https://wolfram.com/xid/0b8d3ibs3y-dr5y7

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Blend of LCHColor directives happens in LCh parameter space:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-hoeo17

In[2]:=2

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https://wolfram.com/xid/0b8d3ibs3y-jhchdj

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Interactive Examples (1)Examples with interactive outputs

Perform dynamic color adaptation in LCh:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-kefblv

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Neat Examples (1)Surprising or curious use cases

Visualizing the color space:

In[1]:=1

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https://wolfram.com/xid/0b8d3ibs3y-cg2mtz

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