Space Cadet
#1d2951
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
#1d2951
RGB
29, 41, 81
OKLCh
29.3% 0.074 268.9°
CIELAB (D50)
17.3, 5.8, -26.6
What is true of this colour, and of no other
- 3 other named colours sit within ΔE00 2 of it.
- It uses only 38% of the chroma available at this lightness and hue — there is a far more vivid version of this colour inside sRGB.
- As text on white it measures APCA Lc 100.7; 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
14.11:1 — passes AA
Black text
1.49:1 — fails AA
White text is the better of the two at14.11:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#1d2951
protanopia
#282851 · ΔE00 3.8
deuteranopia
#262651 · ΔE00 3.7
tritanopia
#24245e · ΔE00 4.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isPico Void at ΔE00 0.839: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Pico VoidΔE00 0.839 · #1d2b53
- Ultramarine VioletΔE00 1.365 · #1d2a58
- Rurikon BlueΔE00 1.609 · #1b294b
- Fainting LightΔE00 2.579 · #1f2847
- BoatswainΔE00 2.962 · #243256
- Dark EclipseΔE00 3.035 · #112244
- Dark SoulΔE00 3.051 · #112255
- WahooΔE00 3.074 · #272d4e
- Underwater RealmΔE00 3.16 · #243062
- Fibonacci BlueΔE00 3.179 · #112358
- Schiava BlueΔE00 3.203 · #192961
- Ending Navy BlueΔE00 3.203 · #1c305c
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.