Chartreuse (#CCFF00) is a vibrant yellow-green color that commands attention like no other. Named after the distinctive French liqueur produced by monks since the 1740s, this electrifying hue sits perfectly between yellow and green on the color wheel.

What makes chartreuse truly special is its visibility—it's actually the most visible color to the human eye, making it invaluable for call-to-action buttons and important interface elements. This neon-like quality gives designs instant energy and freshness, perfect for brands wanting to convey innovation and environmental consciousness.

In design applications, chartreuse works best as an accent color rather than a primary one. Its intensity can overwhelm when overused, so pair it strategically with neutral tones like gray, cream, or charcoal for balance. It's particularly striking in dark mode interfaces where its luminosity truly pops.

Psychologically, chartreuse evokes feelings of spontaneity, creativity, and boldness. It's no coincidence that it was Etsy's official color of 2020—this rebellious shade has been making comebacks since the 1920s.

Whether you're designing apps focused on sustainability, creating energetic marketing materials, or simply need a color that guarantees visibility, chartreuse delivers that perfect blend of warmth and coolness that makes designs unforgettable.