Lifeguard
#e50000
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
#e50000
RGB
229, 0, 0
OKLCh
57.9% 0.238 29.2°
CIELAB (D50)
48.8, 74.5, 64.4
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 70.6; on black, Lc -31.1. 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 42.7 and 45.0 and 49.7 — no red cone.
Text on this colour
White text
4.85:1 — passes AA
Black text
4.33:1 — large text only
White text is the better of the two at4.85:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#e50000
protanopia
#54540a · ΔE00 42.7
deuteranopia
#848400 · ΔE00 45.0
tritanopia
#a7a700 · ΔE00 49.7
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isElectric Red at ΔE00 0.221: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Electric RedΔE00 0.221 · #e60000
- Little Red CorvetteΔE00 0.222 · #e50102
- Bern RedΔE00 1.04 · #e20909
- Level !ΔE00 1.108 · #e4090b
- Red Wrath of ZeusΔE00 1.168 · #e0180c
- Thicker Than WaterΔE00 1.207 · #e02006
- Midwinter FireΔE00 1.456 · #dd1100
- AnarchyΔE00 1.472 · #de0300
- RepublicanΔE00 1.516 · #de0100
- AlarmΔE00 1.56 · #ec0003
- KU CrimsonΔE00 1.578 · #e8000d
- Passion for RevengeΔE00 1.598 · #dd0d06
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.