Cross My Heart
#ad2a2d
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#ad2a2d
RGB
173, 42, 45
OKLCh
49.5% 0.167 24.7°
CIELAB (D50)
39.8, 53.0, 32.3
What is true of this colour, and of no other
- 18 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 83% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 81.6; on black, Lc -20.3. 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 33.3 and 39.0 and 45.2 — no red cone.
Text on this colour
White text
6.68:1 — passes AA
Black text
3.15:1 — large text only
White text is the better of the two at6.68:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#ad2a2d
protanopia
#49492e · ΔE00 33.3
deuteranopia
#686824 · ΔE00 39.0
tritanopia
#818100 · ΔE00 45.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSamba at ΔE00 0.96: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- SambaΔE00 0.96 · #aa262b
- Red SquareΔE00 0.969 · #aa262a
- Très BienΔE00 1.045 · #a82f2e
- Tartan RedΔE00 1.159 · #b1282a
- Upsdell RedΔE00 1.193 · #ae2029
- Emperor Cherry RedΔE00 1.375 · #ac2c32
- Fabulous RedΔE00 1.472 · #a92c29
- Raging RaisinΔE00 1.502 · #aa3333
- Drive-In CherryΔE00 1.557 · #a62e30
- Harissa RedΔE00 1.657 · #a52a2a
- SalsaΔE00 1.784 · #b31928
- Red InkΔE00 1.807 · #ac3235
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.