HexToCol {DescTools}

Identify Closest Match to a Color Given by a Hexadecimal String

Description

Given a color as a hex string #rrggbb, find the closest match in the table of known (named) colors.

Usage

HexToCol(hexstr, method = "rgb", metric = "euclidean")

Arguments

hexstr

a color or a vector of colors specified as hexadecimal string of the form "#RRGGBB" or "#RRGGBBAA"

method

character string specifying the color space to be used. Can be "rgb" (default) or "hsv".

metric

character string specifying the metric to be used for calculating distances between the colors. Available options are "euclidean" (default) and "manhattan". Euclidean distances are root sum-of-squares of differences, and manhattan distances are the sum of absolute differences.

Details

Finds the color with the minimum squared distance in RGB space.

Value

The colorname(s) of the closest match(es) (if more than one).

Author(s)

Ben Bolker, vector support Andri Signorell <[e-mail]>

See Also

ColToHex, ColToRgb, colors

Examples

ColToHex(c("lightblue", "salmon"))

HexToCol(c("#ADD8E6", "#FA1572"))
HexToCol(Pal("Helsana"))

x <- ColToRgb("darkmagenta")
x[2,] <- x[2,] + 155
RgbToCol(x)