Chilli Pepper
#ac1e3a
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#ac1e3a
RGB
172, 30, 58
OKLCh
48.6% 0.175 16.9°
CIELAB (D50)
38.5, 56.6, 22.8
What is true of this colour, and of no other
- 10 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 90% 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 82.6; on black, Lc -19.3. 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 30.5 and 39.7 and 49.4 — no red cone.
Text on this colour
White text
7.00:1 — passes AA
Black text
3.00:1 — large text only
White text is the better of the two at7.00:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#ac1e3a
protanopia
#44443b · ΔE00 30.5
deuteranopia
#656533 · ΔE00 39.7
tritanopia
#7e7e00 · ΔE00 49.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRouge at ΔE00 1.332: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- RougeΔE00 1.332 · #ab1239
- BresaolaΔE00 1.536 · #a9203e
- Vinho do PortoΔE00 1.645 · #b31a38
- Melancholic MacawΔE00 1.695 · #aa1133
- Dòu Shā Sè RedΔE00 1.763 · #a52939
- Romeo O RomeoΔE00 1.786 · #a4233c
- Alabama CrimsonΔE00 1.79 · #a32638
- Pure PassionΔE00 1.837 · #b40039
- Warlock RedΔE00 1.872 · #b50038
- Red Tuna FruitΔE00 1.983 · #b41b40
- Scarlet SageΔE00 2.002 · #aa2335
- ChernobogΔE00 2.088 · #ac0132
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.