Nightly Expedition
#221188
A blue that is saturated. It is dark — it carries white text and needs care with black.
Hex
#221188
RGB
34, 17, 136
OKLCh
31.3% 0.178 275.2°
CIELAB (D50)
16.7, 38.0, -63.2
What is true of this colour, and of no other
- 2 other named colours sit within ΔE00 2 of it.
- It uses 91% 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 99.4; 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
13.97:1 — passes AA
Black text
1.50:1 — fails AA
White text is the better of the two at13.97:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#221188
protanopia
#141488 · ΔE00 1.7
deuteranopia
#171788 · ΔE00 2.0
tritanopia
#1b1b80 · ΔE00 2.8
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isGalactic Cruise at ΔE00 1.7: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Galactic CruiseΔE00 1.7 · #111188
- Blue TrustΔE00 1.879 · #120a8f
- IndiglowΔE00 2.301 · #301885
- YearningΔE00 2.301 · #061088
- Orbital KingdomΔE00 2.498 · #220088
- Outer RimΔE00 2.511 · #221177
- Phthalo BlueΔE00 2.567 · #000f89
- Dramatic BlueΔE00 2.594 · #240093
- Cadmium BlueΔE00 2.641 · #0a1195
- Snowstorm Space ShuttleΔE00 2.677 · #001188
- PrunelleΔE00 2.891 · #220878
- Blue BeetleΔE00 2.931 · #220099
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.