Pi
#314159
A blue that is nearly neutral — the hue shows only against a true grey. It is dark — it carries white text and needs care with black.
Hex
#314159
RGB
49, 65, 89
OKLCh
37.2% 0.046 258.3°
CIELAB (D50)
27.0, -1.2, -16.6
What is true of this colour, and of no other
- 9 other named colours sit within ΔE00 2 of it.
- It uses only 33% of the chroma available at this lightness and hue — there is a far more vivid version of this colour inside sRGB.
- As text on white it measures APCA Lc 94.0; on black, Lc -8.6. 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 7.7 and 7.9 and 7.9 — no red cone.
Text on this colour
White text
10.34:1 — passes AA
Black text
2.03:1 — fails AA
White text is the better of the two at10.34:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#314159
protanopia
#3f3f59 · ΔE00 7.7
deuteranopia
#3d3d59 · ΔE00 7.9
tritanopia
#3a3a71 · ΔE00 7.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isPassionate Blueberry at ΔE00 0.818: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Passionate BlueberryΔE00 0.818 · #334159
- Winter SeaΔE00 1.16 · #303e55
- Academic BlueΔE00 1.291 · #2c3e56
- MadisonΔE00 1.65 · #2d3c54
- SpelunkingΔE00 1.662 · #35465e
- Sharp BlueΔE00 1.711 · #2b3d54
- Waterhen BackΔE00 1.864 · #2f3f53
- BiscayΔE00 1.888 · #2f3c53
- SoulfulΔE00 1.952 · #374357
- Blue Tone InkΔE00 2.145 · #2b4057
- Moonlit OceanΔE00 2.248 · #30445a
- Stay the NightΔE00 2.291 · #314662
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.