Federation of Love
#b71010
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#b71010
RGB
183, 16, 16
OKLCh
49.5% 0.195 28.4°
CIELAB (D50)
39.5, 61.3, 48.5
What is true of this colour, and of no other
- 9 other named colours sit within ΔE00 2 of it.
- It uses 96% 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 81.2; on black, Lc -20.7. 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 37.5 and 41.3 and 45.6 — no red cone.
Text on this colour
White text
6.79:1 — passes AA
Black text
3.10:1 — large text only
White text is the better of the two at6.79:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#b71010
protanopia
#444414 · ΔE00 37.5
deuteranopia
#696900 · ΔE00 41.3
tritanopia
#858500 · ΔE00 45.6
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRed Sentinel at ΔE00 0.378: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Red SentinelΔE00 0.378 · #b9090f
- BullseyeΔE00 0.811 · #b9030a
- Sinoper RedΔE00 0.848 · #bb1111
- Red LustΔE00 0.851 · #b4090d
- Cornell RedΔE00 0.916 · #b31b11
- Thick RedΔE00 0.943 · #b30d0d
- Red BaronΔE00 0.99 · #bb0011
- International OrangeΔE00 1.429 · #ba160c
- Bloody MaryΔE00 1.522 · #ba0105
- All Systems RedΔE00 2.013 · #b30103
- Tomato SauceΔE00 2.045 · #b21807
- CarnelianΔE00 2.06 · #b31b1b
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.