Seaside
#66a4b0
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
#66a4b0
RGB
102, 164, 176
OKLCh
68.1% 0.066 211.2°
CIELAB (D50)
63.5, -18.4, -12.9
What is true of this colour, and of no other
- 2 other named colours sit within ΔE00 2 of it.
- It uses 56% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 53.8; on black, Lc -48.1. 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 20.4 and 21.2 and 22.9 — no red cone.
Text on this colour
White text
2.80:1 — fails AA
Black text
7.50:1 — passes AA
Black text is the better of the two at7.50:1. That is enough for body text.
As text on white, it needs to change
#42808b 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
#66a4b0
protanopia
#9f9fb0 · ΔE00 20.4
deuteranopia
#9595b1 · ΔE00 21.2
tritanopia
#8a8aff · ΔE00 22.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isNirvana Jewel at ΔE00 1.792: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Nirvana JewelΔE00 1.792 · #64a5ad
- StillwaterΔE00 1.881 · #70a4b0
- Aqua SeaΔE00 2.041 · #61a1a9
- Explorer BlueΔE00 2.197 · #57a3b3
- Summer SeaΔE00 2.339 · #66a9b1
- Crystal BlueΔE00 2.362 · #68a0b0
- Echo OneΔE00 2.442 · #629da6
- Blue MercuryΔE00 2.477 · #67a6ac
- Blue CalypsoΔE00 2.638 · #55a7b6
- Timid SeaΔE00 2.646 · #66a9b0
- Reef WatersΔE00 2.666 · #6f9fa9
- Flood OutΔE00 2.783 · #579dab
12 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.