Cerulean
A deep, cool blue -- the dependable foundation of trustworthy interfaces.
Create Cerulean 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;
$cerulean = Color::parse('#007BA7');ColorInterface
$cerulean
#007ba7 · oklch(0.5478 0.1123 232.4)
Build a Cerulean harmony
tetradic() keeps Cerulean and adds three partners at equal quarter-turns around the OKLCH hue wheel.
<?php
$harmony = $cerulean->tetradic();
foreach ($harmony as $color) {
echo $color->toHex().PHP_EOL;
}- 0
#007ba7 - 1
#8f5997 - 2
#a35c2b - 3
#478142
Generate a Cerulean scale
Keep the original hue and chroma, then vary OKLCH lightness to produce perceptually ordered steps.
<?php
$oklch = $cerulean->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 Cerulean for the web
The same object can emit a compact Hex value, an sRGB CSS function, or its perceptual OKLCH coordinates.
<?php
$hex = $cerulean->toHex();
$rgb = $cerulean->toCss('srgb');
$oklch = $cerulean->to('oklch')->toCss();- hex
#007ba7- rgb
rgb(0 123 167)- oklch
oklch(0.547839 0.112302 232.391)