HueComb

Vapour

#f0ffff

A neutral that has no useful hue — it reads as a grey. It is very light — it works as a page background, not as text.

Hex

#f0ffff

RGB

240, 255, 255

OKLCh

98.9% 0.016 196.9°

CIELAB (D50)

98.9, -5.1, -1.8

What is true of this colour, and of no other

  • 4 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 0.0; on black, Lc -105.8. 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 6.8 and 7.3 and 8.0 — no red cone.

Text on this colour

White text

1.03:1 — fails AA

Black text

20.45:1 — passes AA

Black text is the better of the two at20.45:1. That is enough for body text.

As text on white, it needs to change

#6c7979 is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved.

Try it against your own background

The same colour, with one cone missing

As you see it

#f0ffff

protanopia

#fdfdff · ΔE00 6.8

deuteranopia

#fbfbff · ΔE00 7.3

tritanopia

#f8f8ff · ΔE00 8.0

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isAphrodite’s Pearls at ΔE00 0.751: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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