Exploring the Color #0A139E

#0A139E sits at 236° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 88% saturation and 33% lightness, it reads as a fully saturated, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 10, 19, 158 produces a 13.13:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.

In RGB space #0A139E is a clear variant of CSS navy — about 37 units away from #000080. Designers reach for blue hues at this saturation when the brief calls for bold, immediate signal, 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