Interpolate a brand transition

Generate seven evenly positioned colors between two brand endpoints in Oklab.

Choose the interpolation space explicitly so the intermediate colors are reproducible:

use PhpColor\Color\Color;
use PhpColor\Color\Palette\ColorPalette;

$transition = ColorPalette::interpolate(
    Color::parse('#7c3aed'),
    Color::parse('#f59e0b'),
    steps: 7,
    space: 'oklab',
);

assert([
    '#7c3aed', '#8b59d7', '#9d6dbf', '#b17da6',
    '#c78a88', '#dd9561', '#f59e0b',
] === $transition->toHex());

Both endpoints are included. The result is an unnamed ordered palette; name its positions separately if they become design tokens.

See palette interpolation or read interpolation and sampling.