HueComb

MVS Red

#ee0000

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

#ee0000

RGB

238, 0, 0

OKLCh

59.6% 0.245 29.2°

CIELAB (D50)

50.7, 76.7, 66.3

What is true of this colour, and of no other

  • 13 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 68.4; on black, Lc -33.3. 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 43.6 and 45.8 and 50.4 — no red cone.

Text on this colour

White text

4.53:1 — passes AA

Black text

4.64:1 — passes AA

Black text is the better of the two at4.64:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#ee0000

protanopia

#57570b · ΔE00 43.6

deuteranopia

#898900 · ΔE00 45.8

tritanopia

#aeae00 · ΔE00 50.4

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isHelvetia Red at ΔE00 0.437: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

7 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.