Red Pegasus
#dd0000
A red that is about as vivid as sRGB can show at this lightness. It is mid — the hardest range to put text on, either colour struggles.
Hex
#dd0000
RGB
221, 0, 0
OKLCh
56.4% 0.231 29.2°
CIELAB (D50)
47.1, 72.5, 62.7
What is true of this colour, and of no other
- 20 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 72.5; on black, Lc -29.2. 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 42.0 and 44.4 and 49.0 — no red cone.
Text on this colour
White text
5.15:1 — passes AA
Black text
4.07:1 — large text only
White text is the better of the two at5.15:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#dd0000
protanopia
#51510a · ΔE00 42.0
deuteranopia
#7f7f00 · ΔE00 44.4
tritanopia
#a1a100 · ΔE00 49.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRepublican at ΔE00 0.244: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- RepublicanΔE00 0.244 · #de0100
- AnarchyΔE00 0.306 · #de0300
- Passion for RevengeΔE00 0.629 · #dd0d06
- Midwinter FireΔE00 0.749 · #dd1100
- OrkoΔE00 0.807 · #d91407
- Red RepublicΔE00 1.259 · #d70200
- RedsurrectionΔE00 1.364 · #d90b0b
- Hot Flamin ChilliΔE00 1.416 · #dd180e
- Bern RedΔE00 1.53 · #e20909
- Dragon’s BreathΔE00 1.639 · #d41003
- Red Wrath of ZeusΔE00 1.655 · #e0180c
- LifeguardΔE00 1.758 · #e50000
5 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.