Beyond the Stars
#0a3251
A blue that is nearly neutral — the hue shows only against a true grey. It is dark — it carries white text and needs care with black.
Hex
#0a3251
RGB
10, 50, 81
OKLCh
30.8% 0.070 246.7°
CIELAB (D50)
19.4, -4.0, -23.2
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses 88% 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 99.3; 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.
- protanopia and deuteranopia and tritanopia shift it by ΔE00 12.0 and 11.6 and 9.7 — no red cone.
Text on this colour
White text
13.22:1 — passes AA
Black text
1.59:1 — fails AA
White text is the better of the two at13.22:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#0a3251
protanopia
#2f2f51 · ΔE00 12.0
deuteranopia
#2a2a51 · ΔE00 11.6
tritanopia
#242472 · ΔE00 9.7
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isNight Dive at ΔE00 1.161: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Night DiveΔE00 1.161 · #003355
- Indigo BlackΔE00 1.7 · #002e51
- Crow Black BlueΔE00 1.707 · #112f4b
- Incremental BlueΔE00 1.709 · #123456
- Sea of StarsΔE00 2.089 · #0b334d
- Royal Blue MetallicΔE00 2.25 · #082d4f
- Dark Denim BlueΔE00 2.403 · #00334f
- Effervescent BlueΔE00 2.437 · #00315a
- Midnight OceanΔE00 2.649 · #0f2d4d
- Halite BlueΔE00 2.997 · #09324a
- PoseidonΔE00 3.177 · #143c5d
- Gibraltar SeaΔE00 3.409 · #133a54
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.