col2hex: Get hex color

In fmicompbio/swissknife: Handy code shared in the FMI CompBio group

Get hex color

Description

The function returns a color in hex form given a valid name of a color in R.

Usage

col2hex(col, alpha = 255)

Arguments

col	a character, integer or vector of both types containing the names of the colors or colors as integers.
alpha	a numerical value in the range [0,1] or [0,255] that indicates the transparency of the color(s). If the given values are between 0 and 1, they are mapped to be between 0 and 255. An alpha value of 1 assumes the [0,1] range and provides maximum color. The default is set to 255.

Value

a character or character vector with the hex colors.

Author(s)

Dania Machlab

Examples

y <- rnorm(1000,0,1)
cols <- rep("red", length(y))
alpha <- seq(0,1,length.out=length(y))
hexcols <- col2hex(cols, alpha)
plot(1:length(y), y, bg=hexcols, pch=21)

y <- rnorm(1000,0,1)
cols <- rep("red", length(y))
alpha <- seq(0,255,length.out=length(y))
hexcols <- col2hex(cols, alpha)
plot(1:length(y), y, bg=hexcols, pch=21)

fmicompbio/swissknife documentation built on June 11, 2025, 4:17 p.m.