Blood Rush
#aa2222
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#aa2222
RGB
170, 34, 34
OKLCh
48.2% 0.172 26.6°
CIELAB (D50)
38.2, 54.2, 36.9
What is true of this colour, and of no other
- 12 other named colours sit within ΔE00 2 of it — this part of the space is crowded, and the names here are finer distinctions than most people make.
- It uses 88% 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 83.0; on black, Lc -18.9. 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 34.3 and 39.4 and 44.2 — no red cone.
Text on this colour
White text
7.09:1 — passes AA
Black text
2.96:1 — fails AA
White text is the better of the two at7.09:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#aa2222
protanopia
#454524 · ΔE00 34.3
deuteranopia
#656515 · ΔE00 39.4
tritanopia
#7d7d00 · ΔE00 44.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRed Menace at ΔE00 0.206: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Red MenaceΔE00 0.206 · #aa2121
- Bloody RubyΔE00 1.101 · #a81c1d
- Fresh AuburnΔE00 1.216 · #a52a24
- Ketchup LaterΔE00 1.227 · #a91c1c
- Fabulous RedΔE00 1.514 · #a92c29
- Brick by BrickΔE00 1.603 · #b22122
- FirebrickΔE00 1.67 · #b22222
- Mammary RedΔE00 1.766 · #b00b1e
- Scarlet BlazeΔE00 1.775 · #b21f1f
- Boy RedΔE00 1.853 · #b3111d
- Red SquareΔE00 1.937 · #aa262a
- Siren ScarletΔE00 1.946 · #b21d1d
7 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.