Convert an R color to a BGR(A) numeric vector

Mirrors the interface of col2rgb: accepts any R color name or hex string, plus a pre-formed numeric BGR or BGRA vector.

Usage

col2bgr(color, alpha = FALSE)

Arguments

color

An R color name (e.g., "red"), a hex string (e.g., "#FF0000"), or a numeric vector of length 3 (BGR) or 4 (BGRA) with values in [0, 255].

alpha

Logical. When TRUE, include the alpha channel (output is BGRA). Applies only to string/hex input; numeric vectors are returned as-is regardless of this flag. Default FALSE.

Value

A named numeric vector c(B = ..., G = ..., R = ...) when alpha = FALSE, or c(B = ..., G = ..., R = ..., A = ...) when alpha = TRUE.