SlateGray
A mid, cool blue -- the dependable foundation of trustworthy interfaces.
Create SlateGray 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;
$slategray = Color::parse('#708090');ColorInterface
$slategray
#708090 · oklch(0.5925 0.0309 248.3)
Build a SlateGray harmony
tetradic() keeps SlateGray and adds three partners at equal quarter-turns around the OKLCH hue wheel.
<?php
$harmony = $slategray->tetradic();
foreach ($harmony as $color) {
echo $color->toHex().PHP_EOL;
}- 0
#708090 - 1
#8b7784 - 2
#8b7b6b - 3
#6f8477
Generate a SlateGray scale
Keep the original hue and chroma, then vary OKLCH lightness to produce perceptually ordered steps.
<?php
$oklch = $slategray->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 SlateGray for the web
The same object can emit a compact Hex value, an sRGB CSS function, or its perceptual OKLCH coordinates.
<?php
$hex = $slategray->toHex();
$rgb = $slategray->toCss('srgb');
$oklch = $slategray->to('oklch')->toCss();- hex
#708090- rgb
rgb(112 128 144)- oklch
oklch(0.592504 0.0309247 248.348)