col2hexStr: Convert color to Hex string

In dipsaus: A Dipping Sauce for Data Analysis and Visualizations

Convert color to Hex string

Description

Convert color to Hex string

Usage

col2hexStr(col, alpha = NULL, prefix = "#", ...)

Arguments

col	character or integer indicating color
alpha	NULL or numeric, transparency. See grDevices::rgb
prefix	character, default is "#"
...	passing to adjustcolor

Details

col2hexStr converts colors such as 1, 2, 3, "red", "blue", ... into hex strings that can be easily recognized by 'HTML', 'CSS' and 'JavaScript'. Internally this function uses adjustcolor with two differences:

1. the returned hex string does not contain alpha value if alpha is NULL;

2. the leading prefix "#" can be customized

Value

characters containing the hex value of each color. See details

See Also

adjustcolor

Examples

col2hexStr(1, prefix = '0x')      # "0x000000"
col2hexStr('blue')                # "#0000FF"

# Change default palette, see "grDevices::colors()"
grDevices::palette(c('orange3', 'skyblue1'))
col2hexStr(1)                     # Instead of #000000, #CD8500

dipsaus documentation built on June 27, 2024, 5:10 p.m.