Exploring the Color #133189

#133189 sits at 225° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 76% saturation and 31% lightness, it reads as a richly saturated, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 19, 49, 137 produces a 11.49:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.

In RGB space #133189 is a clear variant of CSS navy — about 53 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