Shadow of Night
#2a4f61
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
#2a4f61
RGB
42, 79, 97
OKLCh
40.8% 0.052 231.0°
CIELAB (D50)
31.5, -9.4, -14.9
What is true of this colour, and of no other
- 8 other named colours sit within ΔE00 2 of it.
- It uses 63% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 90.0; on black, Lc -12.3. 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 15.2 and 15.8 and 13.2 — no red cone.
Text on this colour
White text
8.79:1 — passes AA
Black text
2.39:1 — fails AA
White text is the better of the two at8.79:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#2a4f61
protanopia
#4c4c61 · ΔE00 15.2
deuteranopia
#464661 · ΔE00 15.8
tritanopia
#404091 · ΔE00 13.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRegatta Bay at ΔE00 1.534: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Regatta BayΔE00 1.534 · #2d5367
- Deep DiveΔE00 1.692 · #2e5467
- Deep Sea BlueΔE00 1.729 · #2a4b5a
- Celtic RushΔE00 1.785 · #2e4c5b
- ArapawaΔE00 1.796 · #274a5d
- WakefieldΔE00 1.878 · #295468
- JuggernautΔE00 1.91 · #255367
- Marea BajaΔE00 1.951 · #2e5464
- Rugged TealΔE00 2.016 · #254e5d
- Deep OceanΔE00 2.033 · #2a4b5f
- Velvet EveningΔE00 2.07 · #33505e
- WentworthΔE00 2.116 · #345362
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.