modify_hcl: Modify Individual HCL Axes

In prismatic: Color Manipulation Tools

Modify Individual HCL Axes

Description

This function lets you modify individual axes of a color in HCL color space.

Usage

modify_hcl(col, h, c, l)

Arguments

col	a color object or vector of any of the three kinds of R color specifications, i.e., either a color name (as listed by colors()), a hexadecimal string of the form "#rrggbb" or "#rrggbbaa" (see rgb), or a positive integer i meaning palette()[i].
h	Expression to modify the hue of 'col'
c	Expression to modify the chroma of 'col'
l	Expression to modify the luminance of 'col'

Details

The expression used in 'h', 'c', and 'l' is evaluated in the 'hcl' space and and you have access to 'h', 'c', and 'l' as vectors along with vectors in the calling environment.

'h' ranges from 0 to 360, 'l' ranges from 0 to 100, and 'c' while depended on 'h' and 'l' will roughly be within 0 and 180, but often on a narrower range. Colors after modification will be adjusted to fit within the color space.

Value

a colors object.

Source

https://en.wikipedia.org/wiki/HCL_color_space

Examples

plot(modify_hcl("red", h = 160))
plot(modify_hcl("red", h = h + 50))

plot(modify_hcl("red", h = h + 1:100))
plot(modify_hcl("red", c = c - 1:200))
plot(modify_hcl("red", l = l + 1:50))

plot(modify_hcl(rainbow(10), l = 25))

plot(modify_hcl(rainbow(10), h + h / 2, l = 70))

prismatic documentation built on Aug. 15, 2022, 9:06 a.m.