Frozen Periwinkle
#c9d1ef
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
#c9d1ef
RGB
201, 209, 239
OKLCh
86.4% 0.043 273.7°
CIELAB (D50)
83.9, 1.7, -15.8
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses 64% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 24.0; on black, Lc -79.1. 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.
- tritanopia shifts it by ΔE00 5.4 — no blue cone.
Text on this colour
White text
1.52:1 — fails AA
Black text
13.85:1 — passes AA
Black text is the better of the two at13.85:1. That is enough for body text.
As text on white, it needs to change
#6f7691 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
#c9d1ef
protanopia
#d0d0ef · ΔE00 3.6
deuteranopia
#cfcfef · ΔE00 3.6
tritanopia
#cdcdff · ΔE00 5.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isPurple Pj’s at ΔE00 1.439: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Purple Pj’sΔE00 1.439 · #c7cee8
- AceΔE00 1.832 · #c7cce7
- Arctic GlowΔE00 1.968 · #c9d1e9
- Flax BloomΔE00 1.981 · #d2d8f4
- Powdered GraniteΔE00 2.041 · #c3c9e6
- Garden FairyΔE00 2.078 · #ccd4ec
- Periwinkle GreyΔE00 2.316 · #c3cde6
- Icy PlainsΔE00 2.416 · #cfdafb
- Casa del MarΔE00 2.432 · #cacfe6
- Silver SweetpeaΔE00 2.617 · #c4c9e2
- Periwinkle PowderΔE00 2.958 · #c5cbe1
- Twilight MistΔE00 3.067 · #bdc9e4
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.