          `color(${resultColorSpace} -20.5 100 7 / 0.4)`);
        test_valid_value(`color`, `color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x x x / x)`,                    `color(${resultColorSpace} 7 7 7)`);

        // Testing with calc().
        test_valid_value(`color`, `color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} calc(x) calc(y) calc(z))`,                        `color(${resultColorSpace} 7 -20.5 100)`);
        test_valid_value(`color`, `color(from color(${colorSpace} 