Exploring the Color #1B5B58

#1B5B58 sits at 177° on the color wheel, placing it in the cyan family of the cool half of the spectrum. With 54% saturation and 23% lightness, it reads as a moderately saturated, deep tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 27, 91, 88 produces a 7.82:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.

In RGB space #1B5B58 is a clear variant of CSS sea green — about 52 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 weight, depth, and grounded contrast. On screen the cool cast tends to pair best with warm neutrals in the 25°-45° range to add life.

Darkening Shades

Lightening Shades