HueComb

Blue Ribbon

#0066ff

A blue 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

#0066ff

RGB

0, 102, 255

OKLCh

56.4% 0.241 260.8°

CIELAB (D50)

46.4, 24.0, -84.1

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 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 8.9 and 9.2 and 11.0 — no red cone.

Text on this colour

White text

4.83:1 — passes AA

Black text

4.34:1 — large text only

White text is the better of the two at4.83:1. That is enough for body text.

The same colour, with one cone missing

As you see it

#0066ff

protanopia

#6060ff · ΔE00 8.9

deuteranopia

#5656ff · ΔE00 9.2

tritanopia

#4949ff · ΔE00 11.0

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isHeroic Blue at ΔE00 0.43: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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