Redsurrection
#d90b0b
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
#d90b0b
RGB
217, 11, 11
OKLCh
55.9% 0.225 28.8°
CIELAB (D50)
46.6, 70.7, 58.6
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 uses 98% 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 73.4; on black, Lc -28.3. 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 41.3 and 44.4 and 49.0 — no red cone.
Text on this colour
White text
5.25:1 — passes AA
Black text
4.00:1 — large text only
White text is the better of the two at5.25:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#d90b0b
protanopia
#505012 · ΔE00 41.3
deuteranopia
#7d7d00 · ΔE00 44.4
tritanopia
#9e9e00 · ΔE00 49.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isOrko at ΔE00 0.88: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- OrkoΔE00 0.88 · #d91407
- Passion for RevengeΔE00 1.175 · #dd0d06
- StoplightΔE00 1.176 · #dd1111
- Red KnucklesΔE00 1.212 · #dd0011
- Red RepublicΔE00 1.318 · #d70200
- Red PegasusΔE00 1.364 · #dd0000
- Hot Flamin ChilliΔE00 1.383 · #dd180e
- Dragon’s BreathΔE00 1.419 · #d41003
- RepublicanΔE00 1.514 · #de0100
- AnarchyΔE00 1.567 · #de0300
- BoulevardierΔE00 1.584 · #d40701
- Hot FeverΔE00 1.6 · #d40301
5 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.