Ravenclaw
#0a0555
A blue that is muted. It is dark — it carries white text and needs care with black.
Hex
#0a0555
RGB
10, 5, 85
OKLCh
21.7% 0.132 270.4°
CIELAB (D50)
6.6, 27.3, -46.9
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses 93% of the chroma sRGB can show at this lightness and hue — close enough to the boundary that a wider display would show it slightly more vividly.
- As text on white it measures APCA Lc 103.8; on black, Lc 0.0. The sign is the polarity, which the WCAG ratio discards.
- Built into an eleven-step scale, 10 of the 10 adjacent pairs stay ΔE00 2 apart — see the ramp.
- All three dichromacies see it as very nearly the same colour you do: its hue is not the part carrying its identity.
Text on this colour
White text
18.01:1 — passes AA
Black text
1.17:1 — fails AA
White text is the better of the two at18.01:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#0a0555
protanopia
#060655 · ΔE00 0.6
deuteranopia
#060655 · ΔE00 0.6
tritanopia
#070753 · ΔE00 0.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isAlucard’s Night at ΔE00 1.322: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Alucard’s NightΔE00 1.322 · #000055
- Abyssal BlueΔE00 1.527 · #00035b
- Prussian NightsΔE00 1.706 · #0b085f
- Scoop of Dark MatterΔE00 1.76 · #110055
- Silent TwilightΔE00 2.315 · #0f084b
- Space ColonisationΔE00 2.387 · #150f5b
- Night BlueΔE00 2.57 · #040348
- D. Darx BlueΔE00 2.61 · #030764
- Underground StreamΔE00 2.691 · #120a65
- Ultramarine ShadowΔE00 2.836 · #090045
- Darth TorusΔE00 2.894 · #1d045d
- ShadowdancerΔE00 3.045 · #111155
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.