ChartColorUtils

ClassChartGuruChartGuru

public static class ChartColorUtils

Utility methods for color calculations in charts.

Methods

ForGL(Color)

public static Color ForGL(Color c)

Converts a gamma-space color to the correct color for GL/vertex rendering. In Unity’s Linear color space, colors authored as gamma values must be converted to linear before being passed to GL.Color() or vertex buffers, because GL does not perform the conversion automatically (unlike texture sampling). Without this, gamma-authored colors are double-gamma-encoded by the sRGB framebuffer and appear washed out / too bright in Linear mode. In Gamma color space the color is returned unchanged.

Parameters

Name	Type	Description
c	UnityEngine.Color

Returns

UnityEngine.Color — No return description is available.

GetRelativeLuminance(Color)

public static float GetRelativeLuminance(Color color)

Returns the relative luminance of a color (0 = black, 1 = white). Uses the sRGB formula per WCAG 2.1.

Parameters

Name	Type	Description
color	UnityEngine.Color

Returns

System.Single — No return description is available.

GetContrastRatio(Color, Color)

public static float GetContrastRatio(Color foreground, Color background)

Computes the contrast ratio between two Colors (L1 + 0.05) / (L2 + 0.05) where L1 is the lighter luminance and L2 is the darker.

Parameters

Name	Type	Description
foreground	UnityEngine.Color
background	UnityEngine.Color

Returns

System.Single — No return description is available.

GetContrastingTextColor(Color)

public static Color GetContrastingTextColor(Color backgroundColor)

Returns white or black text color for maximum contrast on the given background. Uses WCAG 2.1 contrast guidelines (4.5:1 minimum for normal text).

Parameters

Name	Type	Description
backgroundColor	UnityEngine.Color	The background color behind the text.

Returns

UnityEngine.Color — Color.white or Color.black, whichever provides better contrast.

GetContrastingTextColor(Color, float)

public static Color GetContrastingTextColor(Color backgroundColor, float minContrastRatio)

Returns a contrasting text color that meets the specified minimum contrast ratio. Falls back to white or black based on which meets the threshold; if neither does, returns the one with better contrast.

Parameters

Name	Type	Description
backgroundColor	UnityEngine.Color	The background color behind the text.
minContrastRatio	System.Single	Minimum contrast ratio (default: 4.5 for WCAG AA normal text).

Returns

UnityEngine.Color — Color.white or Color.black for best readability.

Fields

WcagNormalTextContrastMinimum

public const float WcagNormalTextContrastMinimum = 4.5

WCAG 2.1 minimum contrast ratio for normal text (Level AA).

Returns

System.Single — No return description is available.

WcagLargeTextContrastMinimum

public const float WcagLargeTextContrastMinimum = 3

WCAG 2.1 minimum contrast ratio for large text (Level AA).

Returns

System.Single — No return description is available.