Smouldering Red
#ca3434
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#ca3434
RGB
202, 52, 52
OKLCh
55.7% 0.187 25.7°
CIELAB (D50)
46.7, 59.0, 37.7
What is true of this colour, and of no other
- 8 other named colours sit within ΔE00 2 of it.
- It uses 83% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 74.3; on black, Lc -27.4. 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 36.2 and 41.9 and 48.2 — no red cone.
Text on this colour
White text
5.18:1 — passes AA
Black text
4.05:1 — large text only
White text is the better of the two at5.18:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#ca3434
protanopia
#585836 · ΔE00 36.2
deuteranopia
#7b7b29 · ΔE00 41.9
tritanopia
#979700 · ΔE00 48.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isYoung Mahogany at ΔE00 0.279: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Young MahoganyΔE00 0.279 · #ca3435
- Persian RedΔE00 0.442 · #cc3333
- Madder LakeΔE00 0.684 · #cc3336
- StopΔE00 1.302 · #c33a36
- Chef’s KissΔE00 1.613 · #cc3b3b
- 100 MphΔE00 1.754 · #c93f38
- Peri PeriΔE00 1.912 · #c62d2c
- Bento BoxΔE00 1.99 · #cc363c
- Amaranth RedΔE00 2.004 · #d3212d
- Aurora RedΔE00 2.016 · #c13435
- Crimson GlowΔE00 2.033 · #c13939
- Hot LipsΔE00 2.066 · #c9312b
4 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.