Platinum
A pastel yellow with the freshness of a spring yellow.
Create Platinum in PHP
Parse the catalog’s canonical value once, then keep the resulting color object throughout the rest of your code.
<?php
use PhpColor\Color\Color;
$platinum = Color::parse('#E5E4E2');ColorInterface
$platinum
#e5e4e2 · oklch(0.9191 0.0029 84.6)
Tint Platinum for a system
Platinum is a neutral, so rotating its hue changes nothing. Design systems rarely ship a pure neutral either: give it a trace of chroma and it belongs to the palette around it.
<?php
$neutral = $platinum->to('oklch');
foreach (['warm' => 60, 'fresh' => 150, 'cool' => 250] as $name => $hue) {
echo $neutral->withChannel('c', 0.02)->withChannel('h', $hue)->toHex().PHP_EOL;
}- Warm
#efe2d7 - Fresh
#dbe8dd - Cool
#dbe6f1
Generate a Platinum scale
Keep the original hue and chroma, then vary OKLCH lightness to produce perceptually ordered steps.
<?php
$oklch = $platinum->to('oklch');
foreach ([0.97, 0.92, 0.84, 0.74, 0.66, 0.58, 0.48, 0.40, 0.32, 0.24, 0.16] as $lightness) {
$step = $oklch->withChannel('l', $lightness);
}50
100
200
300
400
500
600
700
800
900
950
Format Platinum for the web
The same object can emit a compact Hex value, an sRGB CSS function, or its perceptual OKLCH coordinates.
<?php
$hex = $platinum->toHex();
$rgb = $platinum->toCss('srgb');
$oklch = $platinum->to('oklch')->toCss();- hex
#e5e4e2- rgb
rgb(229 228 226)- oklch
oklch(0.919081 0.00290546 84.5595)