Exploring the Color #588B9F

#588B9F sits at 197° on the color wheel, placing it in the azure family of the cool half of the spectrum. With 29% saturation and 48% lightness, it reads as a softly muted, balanced tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 88, 139, 159 produces a 5.61:1 contrast ratio against black, which clears WCAG AA for body text in that pairing.

In RGB space #588B9F is a clear variant of CSS steel blue — about 29 units away from #4682B4. Designers reach for azure hues at this saturation when the brief calls for restraint and atmosphere, 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