Create colours from colour names in one easy step.
col2hex(x, alpha = 1)
vector of colour names or hex strings
optional transparency value in [0,1], can be per colour in x
character string of hex colours
col2hex(c("aliceblue", "firebrick"), alpha = c(1, .5))
col2hex(c("#FFFFFF", "#123456FF"), alpha = 0.1)
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