HueComb

Firecracker

#f2643a

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

Hex

#f2643a

RGB

242, 100, 58

OKLCh

67.6% 0.184 36.9°

CIELAB (D50)

60.9, 54.1, 51.5

What is true of this colour, and of no other

  • 7 other named colours sit within ΔE00 2 of it.
  • It uses 85% 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 57.8; on black, Lc -44.0. 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 36.7 and 39.7 and 43.8 — no red cone.

Text on this colour

White text

3.15:1 — large text only

Black text

6.66:1 — passes AA

Black text is the better of the two at6.66:1. That is enough for body text.

As text on white, it needs to change

#d34718 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

#f2643a

protanopia

#7f7f3c · ΔE00 36.7

deuteranopia

#a0a02c · ΔE00 39.7

tritanopia

#bcbc00 · ΔE00 43.8

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isOranzhewyi Orange at ΔE00 0.951: 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.