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fix grayscale palette #23

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Merged
prasanthrangan merged 2 commits into from
Jun 28, 2026
Merged

fix grayscale palette #23

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8b9c1d7
fix grayscale palette
prasanthrangan Jun 28, 2026
049a002
fix grayscale palette
prasanthrangan Jun 28, 2026
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12 changes: 7 additions & 5 deletions src/colors.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -410,12 +410,13 @@ fn generate_palette(source_argb: u32, palette: &str) {
let (src_h, src_c, src_t) = argb_to_hct(source_argb, &VC);

// material palette specs
let pri_c = src_c.max(48.0);
let sec_c = 16.0;
let pri_c = src_c;
let (sec_c, ter_c, neu_c, nev_c) = if src_c < 3.0 {
(0.0, 0.0, 0.0, 0.0)
} else {
(src_c * 0.5, src_c * 0.7, 4.0, 8.0)
};
let ter_h = (src_h + 60.0).rem_euclid(360.0);
let ter_c = 24.0;
let neu_c = 4.0;
let nev_c = 8.0;
let err_h = 25.0;
let err_c = 84.0;

Expand Down Expand Up @@ -465,6 +466,7 @@ fn generate_palette(source_argb: u32, palette: &str) {
let mut colors = Vec::with_capacity(roles.len());
for &(group, name, hue, chroma, dark_tone, light_tone) in roles {
let tone = if palette == "dark" { dark_tone } else { light_tone };
let chroma = if palette == "dark" && group == "Surface" && tone <= 10.0 { chroma.min(2.5) } else { chroma };
colors.push(ColorPalette { group, name, argb: hct_to_argb(hue, chroma, tone, &VC) });
}
print_palette(colors);
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