colorConversions {plotwidgets}

Convert colors from and to RGB and HSL formats

Description

Convert colors from and to RGB and HSL formats

Usage

col2rgb.2(col)

col2hsl(col)

hsl2col(hsl)

rgb2col(rgb)

rgb2hsl(rgb)

hsl2rgb(hsl)

Arguments

col

a character vector with colors to convert (palette)

hsl

a numeric matrix with three or four rows (hue, saturation, luminosity and alpha)

rgb

a numeric matrix with three or four rows (red, green, blue and alpha)

Details

These functions convert between RGB and HSL color spaces, and character vectors which contain color names or hash-encoded RGB values ("#FFCC00").

All functions support an alpha channel. For example, unlike the grDevices::col2rgb, col2rgb.2 returns a matrix with four rows: three for R, G and B channels and one for the alpha channel.

Value

col2rgb.2 and col2hsl return a four-row matrix. rgb2col and hsl2col return a character vector.

Functions

• col2rgb.2: Convert a character vector of color names (palette) to a matrix with RGB values

• col2hsl: Convert a character vector of color names (palette) to a matrix with HSL values

• hsl2col: Convert hsl matrix (3 or 4 row) to character vector of color names

• rgb2col: Convert rgb matrix (3 or 4 row) to character vector of color names

• rgb2hsl: Convert a 3- or 4-row matrix of RGB(A) values to a matrix of HSL(A) values

• hsl2rgb: Convert a matrix of HSL values into a matrix of RGB values

See Also

modCol, modhueCol, darkenCol, saturateCol

Examples

haze <- plotPals("haze")
col2rgb(haze)
col2hsl(haze)