Copper Hopper
#bf4000
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#bf4000
RGB
191, 64, 0
OKLCh
54.7% 0.173 39.6°
CIELAB (D50)
46.0, 50.3, 57.8
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It sits exactly on the sRGB boundary: at this lightness and hue the gamut has nothing left, and a wider display would show a more colourful version of it.
- As text on white it measures APCA Lc 75.3; on black, Lc -26.4. 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 34.5 and 35.7 and 39.0 — no red cone.
Text on this colour
White text
5.32:1 — passes AA
Black text
3.95:1 — large text only
White text is the better of the two at5.32:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#bf4000
protanopia
#5b5b06 · ΔE00 34.5
deuteranopia
#787800 · ΔE00 35.7
tritanopia
#919100 · ΔE00 39.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isMahogany at ΔE00 0.21: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- MahoganyΔE00 0.21 · #c04000
- BologneseΔE00 1.266 · #bb4400
- Pindjur RedΔE00 1.56 · #bb4411
- Vinaceous TawnyΔE00 1.947 · #c74300
- Martian IroncrustΔE00 2.016 · #b7410e
- Brick OrangeΔE00 2.322 · #c14a09
- Beef BourguignonΔE00 2.524 · #b64701
- Tennis CourtΔE00 2.533 · #c8450c
- SinopiaΔE00 2.935 · #cb410b
- Mellow MangoΔE00 3.068 · #cc4400
- Dropped BrickΔE00 3.19 · #bb3300
- Red PandaΔE00 3.212 · #c34b1b
6 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.