Snowy Summit

#c5d8e9

A blue 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

#c5d8e9

RGB

197, 216, 233

OKLCh

87.3% 0.031 245.1°

CIELAB (D50)

85.3, -4.0, -10.7

What is true of this colour, and of no other

32 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 47% of the chroma sRGB can show at this lightness and hue.
As text on white it measures APCA Lc 21.9; on black, Lc -81.4. 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 8.8 and 9.3 and 12.2 — no red cone.

Text on this colour

White text

1.46:1 — fails AA

Black text

14.37:1 — passes AA

Black text is the better of the two at14.37:1. That is enough for body text.

As text on white, it needs to change

#687988 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

#c5d8e9

protanopia

#d6d6e9 · ΔE00 8.8

deuteranopia

#d3d3e9 · ΔE00 9.3

tritanopia

#cfcfff · ΔE00 12.2

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isLight Morality at ΔE00 0.682: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

Light MoralityΔE00 0.682 · #c4d9eb
Touch of BlueΔE00 0.743 · #c2d7e9
Light Ridge LightΔE00 0.79 · #c3d5e5
Arctic RainΔE00 0.92 · #c7daed
Light Placid BlueΔE00 1.047 · #c8d8e8
Lull WindΔE00 1.175 · #c3d5e8
Blue BootiesΔE00 1.274 · #c8ddee
Celestial LightΔE00 1.288 · #c7dae8
Light FeatherbedΔE00 1.32 · #c1d8eb
Pacific PanoramaΔE00 1.365 · #c0d6ea
Sea Breeze GreenΔE00 1.365 · #c9d9e7
Tuğçe SilverΔE00 1.456 · #ccddee

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