Could scales `col_*` manipulation functions support relative operations?

[davidhodge931]

The scales col_* manipulation functions are super useful as they can operate on a scales::pal_* function.

It'd be great if they could support relative operations like the {colorspace} ones do.

library(scales)
pal_vctr <- pal_hue(h.start = 0)(3)
pal_vctr
#> [1] "#F8766D" "#00BA38" "#619CFF"
show_col(pal_vctr)

show_col(col_lighter(pal_vctr, amount = 25))

show_col(colorspace::lighten(pal_vctr, method = "relative", amount = 0.33))

^{Created on 2025-07-17 with reprex v2.1.1}