Persian Red
#cc3333
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#cc3333
RGB
204, 51, 51
OKLCh
55.9% 0.190 25.9°
CIELAB (D50)
47.0, 59.9, 38.7
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 74.0; on black, Lc -27.7. 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 36.6 and 42.3 and 48.4 — no red cone.
Text on this colour
White text
5.14:1 — passes AA
Black text
4.09:1 — large text only
White text is the better of the two at5.14:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#cc3333
protanopia
#585835 · ΔE00 36.6
deuteranopia
#7c7c27 · ΔE00 42.3
tritanopia
#989800 · ΔE00 48.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSmouldering Red at ΔE00 0.442: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Smouldering RedΔE00 0.442 · #ca3434
- Young MahoganyΔE00 0.642 · #ca3435
- Madder LakeΔE00 0.83 · #cc3336
- StopΔE00 1.671 · #c33a36
- Chef’s KissΔE00 1.673 · #cc3b3b
- 100 MphΔE00 1.716 · #c93f38
- Amaranth RedΔE00 1.747 · #d3212d
- Hot LipsΔE00 1.92 · #c9312b
- Chi-GongΔE00 1.941 · #d52b2d
- Peri PeriΔE00 2 · #c62d2c
- AkumaΔE00 2.035 · #d63136
- Flaming CherryΔE00 2.048 · #d4202a
5 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.