Function Wcag2Measurement.valid

Whether this object contains a valid WCAG 2 measurement.

bool valid() const pure nothrow @nogc @property @safe;

Example

import color.rgb : SRgbd;

assert(SRgbd(0, 0, 0).wcag2RelativeLuminance.valid);
assert(!SRgbd(-0.1, 0, 0).wcag2RelativeLuminance.valid);
}