HueComb

Buttercup Glow

#f1f458

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

Hex

#f1f458

RGB

241, 244, 88

OKLCh

93.7% 0.173 110.4°

CIELAB (D50)

93.9, -14.7, 71.4

What is true of this colour, and of no other

  • 9 other named colours sit within ΔE00 2 of it.
  • It uses 84% of the chroma sRGB can show at this lightness and hue.
  • As text on white it measures APCA Lc 8.5; on black, Lc -95.8. 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.
  • All three dichromacies see it as very nearly the same colour you do: its hue is not the part carrying its identity.

Text on this colour

White text

1.18:1 — fails AA

Black text

17.82:1 — passes AA

Black text is the better of the two at17.82:1. That is enough for body text.

As text on white, it needs to change

#7a7b00 is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved, and some saturation was given up to stay inside sRGB.

Try it against your own background

The same colour, with one cone missing

As you see it

#f1f458

protanopia

#f4f458 · ΔE00 0.7

deuteranopia

#f3f358 · ΔE00 0.7

tritanopia

#f3f373 · ΔE00 2.9

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isGargantua at ΔE00 1.329: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. 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.