Sample a color scale
Read any normalized position without adding every possible sample to the stored palette.
Stops
0
0.5
1
Samples
0.2
0.5
0.8
0.0 #111827
0.2 #392a70
0.5 #7c3aed
0.8 #c1b4fc
1.0 #f8fafcInterpolate only the position you need
Positions 0, 0.5, and 1 return the stored stops. Positions 0.2 and 0.8 are Oklab mixes of their neighboring entries.
Sample the ordered palette by position
at() maps the normalized position across the complete sequence, then mixes only the two surrounding colors.
<?php
use PhpColor\Color\Palette\ColorPalette;
$scale = ColorPalette::parse([
'#111827', '#7c3aed', '#f8fafc',
]);
foreach ([0.0, 0.2, 0.5, 0.8, 1.0] as $position) {
printf("%.1f %s\n", $position, $scale->at($position)->toHex());
}
// 0.0 #111827
// 0.2 #392a70
// 0.5 #7c3aed
// 0.8 #c1b4fc
// 1.0 #f8fafcSampling requires an unnamed scale
A named palette represents keyed roles rather than a continuous sequence, so at() rejects named input.
RangePositions below 0 clamp to 0; values above 1 clamp to 1.
SpaceInterpolation between neighboring stops uses Oklab.
StopsExact stop positions return the stored color object.
Named palettesConvert role-based data into an ordered scale before sampling.