Horizon
#648894
A cyan 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
#648894
RGB
100, 136, 148
OKLCh
60.4% 0.044 220.4°
CIELAB (D50)
54.3, -10.8, -10.7
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses 40% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 65.7; on black, Lc -35.9. 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 14.9 and 15.9 and 16.7 — no red cone.
Text on this colour
White text
3.82:1 — large text only
Black text
5.49:1 — passes AA
Black text is the better of the two at5.49:1. That is enough for body text.
As text on white, it needs to change
#597c88 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
#648894
protanopia
#858594 · ΔE00 14.9
deuteranopia
#7f7f95 · ΔE00 15.9
tritanopia
#7878d3 · ΔE00 16.7
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isRelaxed Blue at ΔE00 1.434: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Relaxed BlueΔE00 1.434 · #698a97
- Bell BlueΔE00 1.683 · #618b97
- Spirit MountainΔE00 1.696 · #6a8b98
- GothicΔE00 1.83 · #698890
- Durban SkyΔE00 2.33 · #5d8a9b
- Jeans IndigoΔE00 2.346 · #6d8994
- ShorelineΔE00 2.433 · #6c8791
- Pulitzer BlueΔE00 2.482 · #6e8d98
- South PacificΔE00 2.501 · #698694
- Adriatic BlueΔE00 2.529 · #5c899b
- Blue ShoalΔE00 2.594 · #6b8c93
- Secret CoveΔE00 2.832 · #68909d
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.