Space Exploration
#001199
A blue that is saturated. It is dark — it carries white text and needs care with black.
Hex
#001199
RGB
0, 17, 153
OKLCh
32.1% 0.206 264.2°
CIELAB (D50)
17.1, 40.7, -73.1
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses 93% 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 98.3; 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.
- 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
13.63:1 — passes AA
Black text
1.54:1 — fails AA
White text is the better of the two at13.63:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#001199
protanopia
#0f0f99 · ΔE00 0.8
deuteranopia
#0d0d99 · ΔE00 1.0
tritanopia
#09099d · ΔE00 1.3
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isCadmium Blue at ΔE00 0.631: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Cadmium BlueΔE00 0.631 · #0a1195
- RoyalΔE00 1.302 · #0c1793
- Bright MidnightΔE00 1.789 · #011993
- CobaltΔE00 1.904 · #030aa7
- ZaffreΔE00 2.029 · #0014a8
- Blue TrustΔE00 2.088 · #120a8f
- Extravehicular ActivityΔE00 2.135 · #0011aa
- Phthalo BlueΔE00 2.153 · #000f89
- Snowstorm Space ShuttleΔE00 2.224 · #001188
- YearningΔE00 2.238 · #061088
- Galactic CruiseΔE00 2.317 · #111188
- Duke BlueΔE00 2.35 · #00009c
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.