Rust
#a83c09
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#a83c09
RGB
168, 60, 9
OKLCh
50.3% 0.152 40.3°
CIELAB (D50)
41.2, 43.8, 50.0
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses 97% 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 80.6; on black, Lc -21.3. 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 31.6 and 33.2 and 36.0 — no red cone.
Text on this colour
White text
6.33:1 — passes AA
Black text
3.32:1 — large text only
White text is the better of the two at6.33:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#a83c09
protanopia
#52520d · ΔE00 31.6
deuteranopia
#6b6b00 · ΔE00 33.2
tritanopia
#808000 · ΔE00 36.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isDonkey Kong at ΔE00 1.532: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Donkey KongΔE00 1.532 · #ab4210
- Burnt SiennaΔE00 1.544 · #a93400
- MuddyΔE00 1.668 · #a13905
- Rusted LockΔE00 1.917 · #aa4411
- Powdered CoffeeΔE00 3.017 · #a0450e
- PepperoniΔE00 3.232 · #aa4400
- ShakshukaΔE00 3.335 · #aa3311
- Azshara VeinΔE00 3.38 · #b13916
- Martian IroncrustΔE00 3.466 · #b7410e
- Enfield BrownΔE00 3.607 · #a73211
- Hot BrownΔE00 3.613 · #984218
- Rusty RedΔE00 3.752 · #af2f0d
7 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.