Rusty Heart
#a04039
A red that is muted. It is mid — the hardest range to put text on, either colour struggles.
Hex
#a04039
RGB
160, 64, 57
OKLCh
50.0% 0.129 26.9°
CIELAB (D50)
40.8, 40.3, 25.6
What is true of this colour, and of no other
- 11 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 63% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 81.1; on black, Lc -20.8. 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 29.1 and 32.9 and 40.1 — no red cone.
Text on this colour
White text
6.39:1 — passes AA
Black text
3.29:1 — large text only
White text is the better of the two at6.39:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#a04039
protanopia
#52523a · ΔE00 29.1
deuteranopia
#686834 · ΔE00 32.9
tritanopia
#7b7b00 · ΔE00 40.1
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isTomato Slices at ΔE00 1.049: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Tomato SlicesΔE00 1.049 · #a2423d
- Rave RedΔE00 1.243 · #a13b34
- Chilli OilΔE00 1.318 · #9d453c
- Bijou RedΔE00 1.492 · #a33d3b
- Cherry RaceΔE00 1.725 · #a64137
- Burning BushΔE00 1.748 · #a0403e
- Queen’s CoatΔE00 1.757 · #9d433f
- TanagerΔE00 1.774 · #a43834
- Tandoori SpiceΔE00 1.79 · #9f4440
- Mature CognacΔE00 1.881 · #9a463d
- Barrel SpongeΔE00 1.972 · #9e3c31
- Lobster BrownΔE00 2.046 · #a73836
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.