R: Shade an RGB color

col.shade {MESS} | R Documentation

## Shade an RGB color

### Description

Shades an RBG color

### Usage

    col.shade(col, shade = 0.5)

### Arguments

`col` | a vector of RGB color(s)
`shade` | numeric value between 0 and 1. Zero means no change and 1 results in black

### Details

This function shades an RGB color and returns the shaded RGB color (with alpha channel added)

### Author(s)

Claus Ekstrom claus@rprimer.dk

### References

Ekstrom, CT (2011) The R Primer.

### Examples

    newcol <- col.shade("blue")

[Package MESS version 0.5.9 Index]