Exploring the Color #66C957

#66C957 sits at 112° on the color wheel, placing it in the green family of the cool half of the spectrum. With 51% saturation and 56% lightness, it reads as a moderately saturated, light tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 102, 201, 87 produces a 10.06:1 contrast ratio against black, which clears WCAG AAA for body text in that pairing.

In RGB space #66C957 is a distant relative of CSS yellow-green — about 64 units away from #9ACD32. 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