-evo-contrast LESS Function

Adjusts the contrast of a color relative to another color

// Required arguments
@result: -evo-contrast(@color, @change);

// All arguments
@result: -evo-contrast(@color, @change, @complement, @threshold);

Name	Description	Required	Default
color	Color to adjust	Required
change	Amount to adjust the color proportionally, either a decimal or percent from -100% to 100%.	Required
complement	Color adjustment is performed relative to the complement. A decrease (negative) contrast adjustment brings a color closer to the complement, whereas an increase (positive) adjustment adjusts it furhter away. When not provided, either white or black is selected as the complement based on the luminance of the color.	Optional
threshold	When a complement is not provided, threshold defines the color's luminance at which either white or black is selected as the complement.	Optional	.5

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