Hot Butter

#e69d00

An orange that is saturated. It is light — black text sits on it comfortably, white text does not.

Hex

#e69d00

RGB

230, 157, 0

OKLCh

74.9% 0.158 75.6°

CIELAB (D50)

70.7, 21.1, 74.4

What is true of this colour, and of no other

8 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 44.7; on black, Lc -57.4. 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 19.7 and 19.8 and 20.8 — no red cone.

Text on this colour

White text

2.29:1 — fails AA

Black text

9.19:1 — passes AA

Black text is the better of the two at9.19:1. That is enough for body text.

As text on white, it needs to change

#a16c00 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

#e69d00

protanopia

#a7a706 · ΔE00 19.7

deuteranopia

#b6b600 · ΔE00 19.8

tritanopia

#c5c500 · ΔE00 20.8

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isArnica Yellow at ΔE00 0.613: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Arnica YellowΔE00 0.613 · #e59b00
Rowdy OrangeΔE00 0.913 · #eaa007
GambogeΔE00 0.936 · #e49b0f
Bilious BrownΔE00 1.188 · #e39f08
Orange SulphurΔE00 1.699 · #e8a320
Orange SatisfactionΔE00 1.812 · #dd9900
Lemon DreamΔE00 1.843 · #eea300
Golden KeyΔE00 1.876 · #dd9911
Pumpkin YellowΔE00 2.044 · #e99a10
Clarified ButterΔE00 2.115 · #e69c23
Grapefruit YellowΔE00 2.206 · #dfa01a
Tiger KingΔE00 2.475 · #dd9922

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