PhpSpreadsheet/tests/data/Style/ColorChangeBrightness.php

<?php

return [
    // RGBA
    [
        'FFB2C1D1',
        'FFAABBCC',
        0.1,
    ],
    // RGBA
    [
        'FF99A8B7',
        'FFAABBCC',
        -0.1,
    ],
    // RGB
    [
        'B2C1D1',
        'AABBCC',
        0.1,
    ],
    [
        '99A8B7',
        'AABBCC',
        -0.1,
    ],
    [
        'FF1919',
        'FF0000',
        0.1,
    ],
    [
        'E50000',
        'FF0000',
        -0.1,
    ],
    [
        'FF8C8C',
        'FF8080',
        0.1,
    ],
    [
        'E57373',
        'FF8080',
        -0.1,
    ],
    [
        'FF2626',
        'FF0000',
        0.15,
    ],
    [
        'D80000',
        'FF0000',
        -0.15,
    ],
    [
        'FF9393',
        'FF8080',
        0.15,
    ],
    [
        'D86C6C',
        'FF8080',
        -0.15,
    ],
    [
        'FFF783',
        'FFF008',
        0.5,
    ],
    [
        '7F7804',
        'FFF008',
        -0.5,
    ],
];