Slumber
#2d517c
A blue that is muted. It is mid — the hardest range to put text on, either colour struggles.
Hex
#2d517c
RGB
45, 81, 124
OKLCh
42.9% 0.083 253.9°
CIELAB (D50)
33.4, -2.2, -28.8
What is true of this colour, and of no other
- 11 other named colours sit within ΔE00 2 of it — this part of the space is crowded, and the names here are finer distinctions than most people make.
- It uses 61% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 88.0; on black, Lc -14.2. 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 10.6 and 10.0 and 8.8 — no red cone.
Text on this colour
White text
8.14:1 — passes AA
Black text
2.58:1 — fails AA
White text is the better of the two at8.14:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#2d517c
protanopia
#4e4e7c · ΔE00 10.6
deuteranopia
#49497c · ΔE00 10.0
tritanopia
#4242a4 · ΔE00 8.8
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isGalaxy Blue at ΔE00 1.253: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Galaxy BlueΔE00 1.253 · #2d5284
- Boat BlueΔE00 1.253 · #2d5384
- St. TropezΔE00 1.392 · #325482
- OvertakeΔE00 1.435 · #33557f
- Bunting BlueΔE00 1.505 · #35537c
- AssassinΔE00 1.724 · #2d4f83
- Mykonos ReflectionΔE00 1.752 · #284c75
- Mordian BlueΔE00 1.821 · #2f5684
- AerostaticsΔE00 1.944 · #355376
- Royal ConsortΔE00 1.973 · #2e5686
- High AltarΔE00 1.991 · #334f7b
- Flashy SapphireΔE00 2.013 · #2c538a
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.