Lake Lucerne
#689db7
A blue that is nearly neutral — the hue shows only against a true grey. It is light — black text sits on it comfortably, white text does not.
Hex
#689db7
RGB
104, 157, 183
OKLCh
66.9% 0.068 230.3°
CIELAB (D50)
61.8, -13.0, -19.4
What is true of this colour, and of no other
- 6 other named colours sit within ΔE00 2 of it.
- It uses 51% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 56.1; on black, Lc -45.7. 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 18.2 and 17.9 and 15.2 — no red cone.
Text on this colour
White text
2.96:1 — fails AA
Black text
7.10:1 — passes AA
Black text is the better of the two at7.10:1. That is enough for body text.
As text on white, it needs to change
#497d96 is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved.
The same colour, with one cone missing
As you see it
#689db7
protanopia
#9898b7 · ΔE00 18.2
deuteranopia
#9090b8 · ΔE00 17.9
tritanopia
#8686ff · ΔE00 15.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isYacht Blue at ΔE00 0.901: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Yacht BlueΔE00 0.901 · #679bb3
- Adventure IsleΔE00 1.309 · #6f9fb9
- Bluebird FeatherΔE00 1.514 · #6f9db3
- ShakespeareΔE00 1.661 · #609ab8
- Shirt BlueΔE00 1.859 · #6598af
- FateΔE00 1.955 · #6ba0bf
- Dolphin DazeΔE00 2.007 · #659fb5
- Pass Time BlueΔE00 2.104 · #5d98b3
- Air BlueΔE00 2.136 · #69a3c1
- Crisp French BlueΔE00 2.147 · #729eb9
- Ocean ViewΔE00 2.297 · #729bb3
- ChivalryΔE00 2.329 · #5d99b1
12 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.