Re-Entry Red
#cd0317
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#cd0317
RGB
205, 3, 23
OKLCh
53.4% 0.217 26.9°
CIELAB (D50)
43.8, 68.5, 50.9
What is true of this colour, and of no other
- 21 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 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 76.3; on black, Lc -25.5. 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 39.9 and 44.5 and 49.3 — no red cone.
Text on this colour
White text
5.80:1 — passes AA
Black text
3.62:1 — large text only
White text is the better of the two at5.80:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#cd0317
protanopia
#4b4b1b · ΔE00 39.9
deuteranopia
#757500 · ΔE00 44.5
tritanopia
#959500 · ΔE00 49.3
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isScarlet Splendour at ΔE00 0.667: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Scarlet SplendourΔE00 0.667 · #cc0c1b
- Harvard CrimsonΔE00 0.92 · #c90016
- Red RhapsodyΔE00 1 · #ca1b1b
- Venetian RedΔE00 1.01 · #c80815
- Lazy Shell RedΔE00 1.039 · #cc0011
- Hypnotic RedΔE00 1.2 · #cf0d14
- Blood OrangeΔE00 1.228 · #d1001c
- Haemoglobin RedΔE00 1.254 · #c61a1b
- Bloody RedΔE00 1.341 · #ca1f1b
- Chinese RedΔE00 1.396 · #cd071e
- Cherry CrushΔE00 1.401 · #c71414
- Thunder Mountain Longhorn PepperΔE00 1.502 · #ce1b1f
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.