Exploring the Color #5F51A8

#5F51A8 sits at 250° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 35% saturation and 49% lightness, it reads as a softly muted, balanced tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 95, 81, 168 produces a 6.50:1 contrast ratio against white, which clears WCAG AA for body text in that pairing.

In RGB space #5F51A8 is a clear variant of CSS slate blue — about 40 units away from #6A5ACD. 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