HueComb

Thunderbolt

#fdefad

A yellow that is muted. It is very light — it works as a page background, not as text.

Hex

#fdefad

RGB

253, 239, 173

OKLCh

94.8% 0.085 97.6°

CIELAB (D50)

94.4, -2.2, 33.8

What is true of this colour, and of no other

  • 16 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 89% 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 7.4; on black, Lc -96.9. 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.
  • tritanopia shifts it by ΔE00 13.5 — no blue cone.

Text on this colour

White text

1.16:1 — fails AA

Black text

18.13:1 — passes AA

Black text is the better of the two at18.13:1. That is enough for body text.

As text on white, it needs to change

#847738 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

#fdefad

protanopia

#f1f1ad · ΔE00 4.2

deuteranopia

#f3f3ad · ΔE00 4.2

tritanopia

#f6f645 · ΔE00 13.5

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isWood Avens at ΔE00 0.394: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

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