39 lines
842 B
R
39 lines
842 B
R
library(farver)
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library(dplyr, warn.conflicts = FALSE)
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oreilly <- tribble(
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~ name, ~r, ~g, ~b,
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"blue", 0, 113, 188,
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"orange", 247, 147, 30,
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"red", 193, 39, 45,
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"green", 0, 146, 68,
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"yellow", 255, 222, 0,
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"purple", 153, 0, 204
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)
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oreilly$col <- encode_colour(oreilly[c("r", "g", "b")])
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tint <- function(col, tint) {
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n <- length(tint)
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col_Lab <- decode_colour(col, to = "Lab")
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white_Lab <- decode_colour(white, to = "Lab")
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encode_colour(
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col_Lab[rep(1,n), ] * tint + white_Lab[rep(1,n), ] * (1 - tint),
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from = "Lab"
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)
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}
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tints <- seq(0.1, 1, length.out = 10)
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oreilly |>
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group_by(name) |>
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summarize(
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tint = paste0("t", tints * 100),
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colour = tint(col, tints),
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.groups = "drop"
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) |>
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tidyr::pivot_wider(names_from = tint, values_from = colour)
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scales::show_col(tint(oreilly$col[5], tints))
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