Astral
#376f89
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
#376f89
RGB
55, 111, 137
OKLCh
51.5% 0.072 230.4°
CIELAB (D50)
43.9, -13.0, -20.3
What is true of this colour, and of no other
- 10 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 70% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 77.5; on black, Lc -24.3. 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 18.4 and 18.0 and 15.4 — no red cone.
Text on this colour
White text
5.53:1 — passes AA
Black text
3.80:1 — large text only
White text is the better of the two at5.53:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#376f89
protanopia
#6a6a89 · ΔE00 18.4
deuteranopia
#63638a · ΔE00 18.0
tritanopia
#5959cd · ΔE00 15.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isLiving Stream at ΔE00 0.755: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Living StreamΔE00 0.755 · #37708c
- Crashing WavesΔE00 1.062 · #3e6f87
- CalypsoΔE00 1.296 · #3d7188
- Bering WaveΔE00 1.367 · #3d6d84
- Big Ocean WaveΔE00 1.589 · #34708f
- Soul SearchΔE00 1.653 · #377290
- Am I Blue?ΔE00 1.684 · #417086
- Bengal BlueΔE00 1.723 · #38738b
- FaienceΔE00 1.731 · #2a6d8b
- Santorini BlueΔE00 1.964 · #416d83
- Lake StreamΔE00 2.029 · #3e6b83
- DownpourΔE00 2.076 · #43718b
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.