Minion Yellow

#fece4e

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

Hex

#fece4e

RGB

254, 206, 78

OKLCh

87.1% 0.151 87.9°

CIELAB (D50)

85.4, 8.2, 67.3

What is true of this colour, and of no other

29 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 98% 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 22.6; on black, Lc -80.6. 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 12.6 and 12.7 and 13.8 — no red cone.

Text on this colour

White text

1.48:1 — fails AA

Black text

14.15:1 — passes AA

Black text is the better of the two at14.15:1. That is enough for body text.

As text on white, it needs to change

#947200 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

#fece4e

protanopia

#d4d44f · ΔE00 12.6

deuteranopia

#dddd4a · ΔE00 12.7

tritanopia

#e7e700 · ΔE00 13.8

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isMelted Butter at ΔE00 0.497: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Melted ButterΔE00 0.497 · #ffcf53
Decisive YellowΔE00 0.572 · #fdcc4e
Canary DiamondΔE00 0.577 · #ffce52
Flame YellowΔE00 0.66 · #ffcf49
Sunglow GeckoΔE00 0.753 · #ffcf48
Dandy LionΔE00 0.826 · #facc51
Golden HandshakeΔE00 0.976 · #ffcc44
SolarizedΔE00 1.033 · #fbcf4f
Glowing ReviewsΔE00 1.168 · #ffd15a
Capricorn Golden KeyΔE00 1.306 · #fecb51
Go BananasΔE00 1.35 · #f7ca50
RadlerΔE00 1.358 · #ffd15c

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