Scarlet
A mid, warm orange with the energy of a warm sky.
Create Scarlet 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;
$scarlet = Color::parse('#EF4444');ColorInterface
$scarlet
#ef4444 · oklch(0.6368 0.2078 25.3)
Build a Scarlet harmony
tetradic() keeps Scarlet and adds three partners at equal quarter-turns around the OKLCH hue wheel.
<?php
$harmony = $scarlet->tetradic();
foreach ($harmony as $color) {
echo $color->toHex().PHP_EOL;
}- 0
#ef4444 - 1
#899700 - 2
#00aac7 - 3
#9867f9
Generate a Scarlet scale
Keep the original hue and chroma, then vary OKLCH lightness to produce perceptually ordered steps.
<?php
$oklch = $scarlet->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
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Format Scarlet for the web
The same object can emit a compact Hex value, an sRGB CSS function, or its perceptual OKLCH coordinates.
<?php
$hex = $scarlet->toHex();
$rgb = $scarlet->toCss('srgb');
$oklch = $scarlet->to('oklch')->toCss();- hex
#ef4444- rgb
rgb(239 68 68)- oklch
oklch(0.636834 0.207849 25.3313)