Compare palettes across color vision profiles

Reveal where semantic colors converge before hue becomes the only cue for a status, chart, or control.

Original semantic colors and their PHPColor simulation results
Profile	Danger	Warning	Success	Info
Original	Danger `#dc2626`	Warning `#d97706`	Success `#16a34a`	Info `#2563eb`
Deuteranopia	Danger `#98a526`	Warning `#b4bc28`	Success `#4b4065`	Info `#3c38c2`
Protanopia	Danger `#8d8c26`	Warning `#afae21`	Success `#535460`	Info `#4040ca`
Tritanopia	Danger `#d32626`	Warning `#d4373c`	Success `#1d7174`	Info `#28b0aa`
Monochromacy	Danger `#5c5c5c`	Warning `#878787`	Success `#6f6f6f`	Info `#606060`

The same semantic palette, five views

PHPColor transforms the four source colors for each profile. Labels and markers stay in place so the meaning survives when hues move closer together.

Simulate every color in the palette

simulateAll() applies one profile to the complete array and returns sRGB color objects in the same order. The matrix above uses the exact hexadecimal results from this example.

<?php

use PhpColor\Color\Color;
use PhpColor\Color\Vision\ColorVisionSimulator;
use PhpColor\Color\Vision\VisionProfile;

$palette = array_map(
    Color::parse(...),
    ['#dc2626', '#d97706', '#16a34a', '#2563eb'],
);

foreach ([
    VisionProfile::Deuteranopia,
    VisionProfile::Protanopia,
    VisionProfile::Tritanopia,
    VisionProfile::Monochromacy,
] as $profile) {
    $colors = ColorVisionSimulator::create($profile)
        ->simulateAll($palette);

    printf(
        "%s: %s\n",
        $profile->value,
        implode(' ', array_map(
            fn ($color) => $color->toHex(),
            $colors,
        )),
    );
}

Keep meaning outside the hue

Simulation is an early warning for palette relationships. Status text, icons, shapes, patterns, and sufficient contrast must still carry the distinction in the finished interface.

Treat simulation as an approximation

The profiles use transformation matrices on sRGB values, clamp the resulting channels, and return sRGB colors.
Anomalous profiles use a fixed severity of 0.6.
The distinguishability helper uses Euclidean sRGB distance. Its threshold is not Delta E, WCAG, or a clinical measure.
A simulated palette cannot reproduce an individual person's vision or replace testing the complete interface.

Compare palettes across color vision profiles

The same semantic palette, five views

Simulate every color in the palette

Keep meaning outside the hue

Treat simulation as an approximation

Use the result in your workflow

Run the simulation, then inspect the relationships