Blasphemous Blue
#3356aa
A blue that is muted. It is mid — the hardest range to put text on, either colour struggles.
Hex
#3356aa
RGB
51, 86, 170
OKLCh
47.4% 0.141 264.6°
CIELAB (D50)
37.6, 10.0, -49.8
What is true of this colour, and of no other
- No other named colour in the set is within ΔE00 2 of it — it stands alone.
- It uses 47% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 83.4; on black, Lc -18.5. 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 7.2 and 7.1 and 7.7 — no red cone.
Text on this colour
White text
6.88:1 — passes AA
Black text
3.05:1 — large text only
White text is the better of the two at6.88:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#3356aa
protanopia
#5353aa · ΔE00 7.2
deuteranopia
#4e4eaa · ΔE00 7.1
tritanopia
#4747c9 · ΔE00 7.7
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isCerulean Blue at ΔE00 2.284: between 2 and 5 — clearly two colours when compared, easily mistaken from memory. What the numbers mean.
- Cerulean BlueΔE00 2.284 · #2a52be
- Muted LavenderΔE00 2.36 · #3b5698
- Apnea DiveΔE00 2.779 · #284fbd
- Dazzling BlueΔE00 2.837 · #3850a0
- Mourning BlueΔE00 2.844 · #1651bd
- Cyan Cobalt BlueΔE00 2.962 · #28589c
- Lambent LagoonΔE00 2.982 · #3b5b92
- B’dazzled BlueΔE00 2.985 · #2e5894
- The Blues BrothersΔE00 2.996 · #214daa
- Blizzy BlueberryΔE00 3.017 · #1151b4
- SapphireΔE00 3.025 · #0f52ba
- Ruri BlueΔE00 3.035 · #1e50a2
12 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.