Exploring the Color #10303E

#10303E sits at 198° on the color wheel, placing it in the azure family of the cool half of the spectrum. With 59% saturation and 15% 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 16, 48, 62 produces a 13.87:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.

In RGB space #10303E is a distant relative of CSS black — about 80 units away from #000000. Designers reach for azure 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