Exploring the Color #51C731

#51C731 sits at 107° on the color wheel, placing it in the green family of the cool half of the spectrum. With 60% saturation and 49% lightness, it reads as a moderately saturated, balanced tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 81, 199, 49 produces a 9.56:1 contrast ratio against black, which clears WCAG AAA for body text in that pairing.

In RGB space #51C731 is a distant relative of CSS olive drab — about 64 units away from #6B8E23. Designers reach for green hues at this saturation when the brief calls for a conversational, mid-energy register, and at this lightness when they want a present, comfortable mid-canvas voice. On screen the cool cast tends to pair best with warm neutrals in the 25°-45° range to add life.

Darkening Shades

Lightening Shades