Exploring the Color #646F9E

#646F9E sits at 229° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 23% saturation and 51% 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 100, 111, 158 produces a 4.87:1 contrast ratio against white, which clears WCAG AA for body text in that pairing.

In RGB space #646F9E is a clear variant of CSS steel blue — about 42 units away from #4682B4. Designers reach for blue hues at this saturation when the brief calls for restraint and atmosphere, 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