Space Colonisation
#150f5b
A blue that is muted. It is dark — it carries white text and needs care with black.
Hex
#150f5b
RGB
21, 15, 91
OKLCh
24.6% 0.127 275.1°
CIELAB (D50)
10.1, 24.9, -45.0
What is true of this colour, and of no other
- One other named colour sits within ΔE00 2 of it.
- It uses 82% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 103.1; 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.
- All three dichromacies see it as very nearly the same colour you do: its hue is not the part carrying its identity.
Text on this colour
White text
16.78:1 — passes AA
Black text
1.25:1 — fails AA
White text is the better of the two at16.78:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#150f5b
protanopia
#10105b · ΔE00 0.9
deuteranopia
#11115b · ΔE00 1.0
tritanopia
#121257 · ΔE00 1.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isShadowdancer at ΔE00 1.509: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- ShadowdancerΔE00 1.509 · #111155
- Prussian NightsΔE00 2.051 · #0b085f
- Dying Storm BlueΔE00 2.096 · #111166
- Underground StreamΔE00 2.221 · #120a65
- RavenclawΔE00 2.387 · #0a0555
- Ocean AbyssΔE00 2.446 · #221166
- Silent TwilightΔE00 2.915 · #0f084b
- D. Darx BlueΔE00 2.951 · #030764
- Praise of ShadowΔE00 3.1 · #221155
- Abyssal BlueΔE00 3.137 · #00035b
- Interstellar BlueΔE00 3.173 · #001155
- Atlantic DepthsΔE00 3.215 · #001166
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.