Copper
A mid, warm amber with the energy of a warm sky.
Create Copper 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;
$copper = Color::parse('#B87333');ColorInterface
$copper
#b87333 · oklch(0.6180 0.1171 60.4)
Build a Copper harmony
tetradic() keeps Copper and adds three partners at equal quarter-turns around the OKLCH hue wheel.
<?php
$harmony = $copper->tetradic();
foreach ($harmony as $color) {
echo $color->toHex().PHP_EOL;
}- 0
#b87333 - 1
#4a995f - 2
#368ec5 - 3
#ad6aa6
Generate a Copper scale
Keep the original hue and chroma, then vary OKLCH lightness to produce perceptually ordered steps.
<?php
$oklch = $copper->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 Copper for the web
The same object can emit a compact Hex value, an sRGB CSS function, or its perceptual OKLCH coordinates.
<?php
$hex = $copper->toHex();
$rgb = $copper->toCss('srgb');
$oklch = $copper->to('oklch')->toCss();- hex
#b87333- rgb
rgb(184 115 51)- oklch
oklch(0.617953 0.117102 60.3991)