Büchel Cherry
#aa1111
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#aa1111
RGB
170, 17, 17
OKLCh
47.0% 0.183 28.2°
CIELAB (D50)
36.7, 57.6, 44.7
What is true of this colour, and of no other
- 5 other named colours sit within ΔE00 2 of it.
- It uses 95% 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 84.0; on black, Lc -18.0. 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 35.9 and 40.0 and 43.8 — no red cone.
Text on this colour
White text
7.51:1 — passes AA
Black text
2.80:1 — fails AA
White text is the better of the two at7.51:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#aa1111
protanopia
#3f3f14 · ΔE00 35.9
deuteranopia
#626200 · ΔE00 40.0
tritanopia
#7c7c00 · ΔE00 43.8
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isCrisp Christmas Cranberries at ΔE00 1.113: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Crisp Christmas CranberriesΔE00 1.113 · #a6080e
- ChorizoΔE00 1.169 · #aa0011
- Mechrite RedΔE00 1.328 · #a31713
- Real RedΔE00 1.354 · #a90308
- Thick RedΔE00 1.965 · #b30d0d
- Tomato SunriseΔE00 2.032 · #aa251b
- Red LustΔE00 2.038 · #b4090d
- Ketchup LaterΔE00 2.06 · #a91c1c
- Evil CentipedeΔE00 2.136 · #aa2211
- Velvet VolcanoΔE00 2.266 · #ab0102
- Bloody RubyΔE00 2.356 · #a81c1d
- Dear DarlingΔE00 2.361 · #a30112
7 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.