Winter Scene

#becedb

A neutral that has no useful hue — it reads as a grey. It is very light — it works as a page background, not as text.

Hex

#becedb

RGB

190, 206, 219

OKLCh

84.3% 0.025 242.4°

CIELAB (D50)

81.8, -3.7, -8.4

What is true of this colour, and of no other

20 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 only 30% of the chroma available at this lightness and hue — there is a far more vivid version of this colour inside sRGB.
As text on white it measures APCA Lc 27.4; on black, Lc -75.5. 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 7.6 and 8.2 and 13.2 — 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

#6a7984 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

#becedb

protanopia

#ccccdb · ΔE00 7.6

deuteranopia

#c9c9db · ΔE00 8.2

tritanopia

#c6c6ff · ΔE00 13.2

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isConstellation at ΔE00 0.765: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.

ConstellationΔE00 0.765 · #bccedb
Sea DriveΔE00 1.064 · #c2d2e0
MagicalΔE00 1.131 · #c1ceda
SaltwaterΔE00 1.179 · #c2d0de
MelodyΔE00 1.264 · #becbd7
Powder Soft BlueΔE00 1.295 · #b9c9d7
Journey’s EndΔE00 1.452 · #bac9d4
Stillwater LakeΔE00 1.47 · #c2d0df
Light Time TravelΔE00 1.64 · #c5d2df
Salty TearsΔE00 1.649 · #bacad4
MonetΔE00 1.668 · #c3cfdc
Denim LightΔE00 1.734 · #b8cad5

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