Untamed Red
#dd0022
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
#dd0022
RGB
221, 0, 34
OKLCh
56.5% 0.229 25.4°
CIELAB (D50)
47.2, 72.8, 49.7
What is true of this colour, and of no other
- 8 other named colours sit within ΔE00 2 of it.
- 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 72.4; on black, Lc -29.3. 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 41.0 and 47.1 and 51.9 — no red cone.
Text on this colour
White text
5.13:1 — passes AA
Black text
4.10:1 — large text only
White text is the better of the two at5.13:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#dd0022
protanopia
#515125 · ΔE00 41.0
deuteranopia
#7f7f00 · ΔE00 47.1
tritanopia
#a1a100 · ΔE00 51.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isPiercing Red at ΔE00 0.796: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Piercing RedΔE00 0.796 · #dd1122
- Cherry ShineΔE00 1.072 · #d81d26
- Red Hot Chili PepperΔE00 1.141 · #db1d27
- Cadmium RedΔE00 1.357 · #e30022
- Angry TomatoΔE00 1.367 · #d82029
- Royal Mail RedΔE00 1.472 · #da202a
- Flaming CherryΔE00 1.871 · #d4202a
- Maximum RedΔE00 1.923 · #d92121
- Spanish RedΔE00 2.021 · #e60026
- Xiān Hóng RedΔE00 2.133 · #e60626
- Whero RedΔE00 2.157 · #dd262b
- Shojo’s BloodΔE00 2.161 · #e2041b
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.