Exploring the Color #378A77

#378A77 sits at 166° on the color wheel, placing it in the cyan family of the cool half of the spectrum. With 43% saturation and 38% lightness, it reads as a moderately saturated, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 55, 138, 119 produces a 5.06:1 contrast ratio against black, which clears WCAG AA for body text in that pairing.

In RGB space #378A77 is a clear variant of CSS sea green — about 33 units away from #2E8B57. Designers reach for cyan 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