Calculate perceptual-derivative for sequence of hex-colors

This assumes that hex reperesents colors on a continuous-scale where the domain varies uniformly from 0 to 1.

pev_hex_derivative(hex, method = "cie2000")

Arguments

hex	character vector of hex-colors
method	character method to use for distance calculation, passed to farver::compare_color(). One of: "euclidean", "cie1976", "cie94", "cie2000", or "cmc".

Value

numeric

Examples

  pev_fcont("Viridis")(seq(0, 1, by = 0.025)) %>%
    pev_hex_derivative()
#>  [1] 139.44806 126.50066 121.09807 125.76368 128.39942 125.92805 128.37145
#>  [8] 129.86009 126.42235 125.93043 124.39282 118.50278  95.39470  86.44091
#> [15]  89.68236  98.16341 111.65121 117.85282 123.58192 131.61543 141.54127
#> [22] 135.78138 134.11591 147.46890 147.61106 126.19074 125.16032 129.98156
#> [29] 128.78150 124.58214 130.59543 159.31153 171.00922 166.81506 152.49545
#> [36] 137.00919 121.24842 113.08599 104.25259  70.75733  38.69577