Exploring the Color #3A40DF

#3A40DF sits at 238° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 72% saturation and 55% lightness, it reads as a richly saturated, light tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 58, 64, 223 produces a 7.05:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.

In RGB space #3A40DF is a clear variant of CSS royal blue — about 42 units away from #4169E1. 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