A trademark for bright fluorescent colors that are highly visible in daylight, often used on safety equipment and clothing.
Compound of 'day' + 'glow,' created as a trademark in the 1930s for fluorescent paint pigments that remain bright and visible even in strong sunlight, unlike regular neon that fades in daylight.
Dayglow colors work because they don't just reflect light like normal paint—they absorb UV rays and re-emit them as visible light, which is why construction workers and cyclists glow like neon signs even in bright sun.
Complete word intelligence in one call. Free tier — 50 lookups/day.