Exploring the Color #3D366B

#3D366B sits at 248° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 33% saturation and 32% lightness, it reads as a softly muted, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 61, 54, 107 produces a 10.83:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.

In RGB space #3D366B is a distant relative of CSS indigo — about 60 units away from #4B0082. Designers reach for blue hues at this saturation when the brief calls for a conversational, mid-energy register, 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