Dwarf Fortress
#1d0200
A red that is nearly neutral — the hue shows only against a true grey. It is very dark — white text sits on it comfortably, black text does not.
Hex
#1d0200
RGB
29, 2, 0
OKLCh
15.1% 0.054 34.3°
CIELAB (D50)
2.9, 10.2, 4.5
What is true of this colour, and of no other
- No other named colour in the set is within ΔE00 2 of it — it stands alone.
- It sits exactly on the sRGB boundary: at this lightness and hue the gamut has nothing left, and a wider display would show a more colourful version of it.
- As text on white it measures APCA Lc 105.5; 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 12.9 and 14.4 and 16.3 — no red cone.
Text on this colour
White text
19.79:1 — passes AA
Black text
1.06:1 — fails AA
White text is the better of the two at19.79:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#1d0200
protanopia
#060600 · ΔE00 12.9
deuteranopia
#0d0d00 · ΔE00 14.4
tritanopia
#131300 · ΔE00 16.3
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isItalian Roast at ΔE00 2.898: between 2 and 5 — clearly two colours when compared, easily mistaken from memory. What the numbers mean.
- Italian RoastΔE00 2.898 · #221111
- Soy SauceΔE00 3.251 · #1a0600
- Ponzu BrownΔE00 3.287 · #220000
- Bighorn SheepΔE00 4.153 · #20120e
- Severely Burnt ToastΔE00 4.204 · #241005
- Root BrewΔE00 4.88 · #290e05
- Dark MatterΔE00 5.767 · #110101
- Dark DangerΔE00 5.813 · #2f1212
- DarkroomΔE00 5.993 · #2f1611
- Used OilΔE00 6.254 · #231712
- Bats CloakΔE00 6.357 · #1f1518
- Seal BrownΔE00 6.541 · #321414
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.