Over the Sky

#98d5ea

A cyan that is nearly neutral — the hue shows only against a true grey. It is very light — it works as a page background, not as text.

Hex

#98d5ea

RGB

152, 213, 234

OKLCh

83.9% 0.069 221.3°

CIELAB (D50)

81.7, -16.4, -16.9

What is true of this colour, and of no other

14 other named colours sit within ΔE00 2 of it — this part of the space is crowded, and the names here are finer distinctions than most people make.
It uses 60% of the chroma sRGB can show at this lightness and hue.
As text on white it measures APCA Lc 27.4; on black, Lc -75.6. 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 19.9 and 20.0 and 18.9 — no red cone.

Text on this colour

White text

1.61:1 — fails AA

Black text

13.04:1 — passes AA

Black text is the better of the two at13.04:1. That is enough for body text.

As text on white, it needs to change

#437f92 is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved.

Try it against your own background

The same colour, with one cone missing

As you see it

#98d5ea

protanopia

#cfcfea · ΔE00 19.9

deuteranopia

#c6c6eb · ΔE00 20.0

tritanopia

#babaff · ΔE00 18.9

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isBlue Effervescence at ΔE00 0.179: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Blue EffervescenceΔE00 0.179 · #97d5ea
Blue SarongΔE00 1.008 · #9ad6e8
Jodhpur BlueΔE00 1.091 · #9bd7e9
Orleans TuneΔE00 1.11 · #97d5e7
Light Budgie BlueΔE00 1.164 · #9ed6e8
Perfectly BlueΔE00 1.294 · #97d0e5
Iqaluit IceΔE00 1.483 · #93cfe3
Sora BlueΔE00 1.628 · #a0d8ef
Light WhimsyΔE00 1.789 · #99d0e7
Light Bright SparkΔE00 1.811 · #94d0e9
Blue Carpenter BeeΔE00 1.827 · #9cd0e4
Light DelphinΔE00 1.894 · #9ed1e3

12 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.