Mix Colors

Mix two sets of colors in RGB space.

Usage

mixCol(col1, col2, weights = 0.5)

Arguments

col1

first vector of colors.

col2

second vector of colors.

weights

numeric value between 0 and 1 specifying the contribution of col2. A value of 0 returns col1, while 1 returns col2.

Value

Character vector of hexadecimal colors.

Details

Colors are mixed linearly in RGB space: $$ x_{mix} = (1 - weights) x_1 + weights x_2 $$

All arguments are recycled as necessary.

See also

Other color.manipulation: addOpacity(), colToOpaque(), darken(), fade(), lighten()

Examples

mixCol("red", "blue")
#> [1] "#7F007F"
mixCol("red", "blue", weights = 0.2)
#> [1] "#CC0033"

# the shorter vector is recycled
mixCol(c("red", "yellow"), "blue")
#> [1] "#7F007F" "#7F7F7F"

# from red to blue
w <- seq(0, 1, 0.1)
barplot(rep(1, 11), col = sapply(w, mixCol, col1 = "red", col2 = "blue"),
        names.arg = w, yaxt = "n", xlab = "weights")