The Bog above Grave-toned Continuing: Color Blindness: How This Color Appears to Different Eyes

For 300 million people with color vision deficiency worldwide, The Bog above Grave-toned Continuing (RGB (44-31-173), HSL 245°/70%/40%) may appear significantly different — here is the science.

The Bog above Grave-toned Continuing
#2C1FAD · RGB (44-31-173) · HSL(245°,70%,40%)

At hue 245°, this color sits in the red-green zone most affected by common dichromacy.

Types of Color Vision Deficiency

Dichromacy (missing one cone type): protanopia (no L/red, ~2% of men), deuteranopia (no M/green, ~1%), tritanopia (no S/blue, <0.1%). Anomalous trichromacy (shifted cone): protanomaly (~6% of men), deuteranomaly (~5%). Achromatopsia (no cones) is extremely rare (<0.003%).

Design Implications

Designing for color blindness means ensuring information is never conveyed through color alone. Test whether this color remains distinguishable from adjacent UI colors under simulated dichromatic conditions.

  • Never use red/green contrast as the only differentiator
  • Add pattern, shape, or text labels alongside color coding
  • Color blindness is X-linked — much higher prevalence in men than women
  • Use a CVD simulator before finalizing any color-coded design system

Colors with similar perceptual properties:

Explore with PIGMENTUM

PIGMENTUM simulates 8 types of color vision for any color.

Full data for The Bog above Grave-toned Continuing → 👁️ Test Color Blindness →