Romantic Thriller
#a2101b
A red that is saturated. It is mid — the hardest range to put text on, either colour struggles.
Hex
#a2101b
RGB
162, 16, 27
OKLCh
45.5% 0.176 25.5°
CIELAB (D50)
35.0, 55.7, 37.3
What is true of this colour, and of no other
- 6 other named colours sit within ΔE00 2 of it.
- It uses 95% 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 85.7; on black, Lc -16.4. 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 34.4 and 39.9 and 44.2 — no red cone.
Text on this colour
White text
8.00:1 — passes AA
Black text
2.63:1 — fails AA
White text is the better of the two at8.00:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#a2101b
protanopia
#3c3c1d · ΔE00 34.4
deuteranopia
#5d5d0a · ΔE00 39.9
tritanopia
#767600 · ΔE00 44.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRed Vitality at ΔE00 0.843: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Red VitalityΔE00 0.843 · #9f1a1d
- Spartan CrimsonΔE00 1.514 · #9e1316
- Dear DarlingΔE00 1.834 · #a30112
- Ruby RedΔE00 1.911 · #9b111e
- Mephiston RedΔE00 1.968 · #9a1115
- Caraquenian CrimsonΔE00 1.978 · #9c0013
- Bloody RubyΔE00 2.026 · #a81c1d
- Castlevania HeartΔE00 2.09 · #a80020
- Clotted RedΔE00 2.095 · #991115
- Gaharā LālΔE00 2.117 · #ac0c20
- Ecstatic RedΔE00 2.117 · #aa1122
- Bleeding CrimsonΔE00 2.187 · #9b1414
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.