Midnight Shadow
#566373
A blue that is nearly neutral — the hue shows only against a true grey. It is mid — the hardest range to put text on, either colour struggles.
Hex
#566373
RGB
86, 99, 115
OKLCh
49.5% 0.030 253.7°
CIELAB (D50)
41.3, -2.2, -10.8
What is true of this colour, and of no other
- 8 other named colours sit within ΔE00 2 of it.
- It uses only 19% of the chroma available at this lightness and hue — there is a far more vivid version of this colour inside sRGB.
- As text on white it measures APCA Lc 80.6; on black, Lc -21.3. 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.
- protanopia and deuteranopia and tritanopia shift it by ΔE00 6.9 and 7.3 and 11.0 — no red cone.
Text on this colour
White text
6.13:1 — passes AA
Black text
3.43:1 — large text only
White text is the better of the two at6.13:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#566373
protanopia
#626273 · ΔE00 6.9
deuteranopia
#5f5f73 · ΔE00 7.3
tritanopia
#5d5d8d · ΔE00 11.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isFuel Town at ΔE00 1.108: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Fuel TownΔE00 1.108 · #596472
- Da BluesΔE00 1.464 · #516172
- Midnight ShowΔE00 1.521 · #546473
- Blue ZephyrΔE00 1.541 · #5b6676
- Black CoralΔE00 1.714 · #54626f
- Sheet BlueΔE00 1.756 · #52616f
- Intermediate BlueΔE00 1.814 · #56626e
- Blue MetalΔE00 1.833 · #5a6370
- Durango BlueΔE00 2.047 · #566777
- English ChannelΔE00 2.443 · #4e6173
- Lithic SandΔE00 2.447 · #53626e
- Blue PlanetΔE00 2.489 · #545e6a
12 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.