lch(.7 45 30 / 40%) alpha c c / alpha)`, `lch(40 45 45 / 0.4)`);

    test_valid_value(`color`, `oklch(from oklch(.7 0.45 30) alpha c h / l)`, `oklch(1 0.45 30 / 0.7)`);
    test_valid_value(`color`, `oklch(from oklch(.7 0.45 30) alpha c h / alpha)`, `oklch(1 0.45 30)`);
    test_valid_value(`color`, `oklch(from oklch(.7 0.45 30) alpha c c / alpha)`, `oklch(1 0.45 0.45)`);
    test_valid_value(`color`, `oklch(from oklch(.7 0.45 30 / 40%) alpha c h / l)`, `oklch(0.4 0.45 30 / 0.7)`);
    test_valid_value(`co