Tempest
#79839b
A blue 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
#79839b
RGB
121, 131, 155
OKLCh
61.0% 0.038 267.4°
CIELAB (D50)
54.6, 0.3, -14.2
What is true of this colour, and of no other
- One other named colour sits within ΔE00 2 of it.
- It uses only 18% 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 65.5; on black, Lc -36.2. 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.
- deuteranopia and tritanopia shift it by ΔE00 5.1 and 7.5 — no green cone.
Text on this colour
White text
3.80:1 — large text only
Black text
5.53:1 — passes AA
Black text is the better of the two at5.53:1. That is enough for body text.
As text on white, it needs to change
#6d778e 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
#79839b
protanopia
#82829b · ΔE00 5.0
deuteranopia
#80809b · ΔE00 5.1
tritanopia
#7e7eb0 · ΔE00 7.5
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isStonewash at ΔE00 1.562: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- StonewashΔE00 1.562 · #74819a
- Your ShadowΔE00 2.497 · #787e93
- Country BlueΔE00 2.51 · #717f9b
- Salon BleuΔE00 2.878 · #7d8697
- Top ShelfΔE00 2.881 · #82889c
- Positively PurpleΔE00 2.905 · #7782a3
- Seattle HazeΔE00 2.906 · #777e90
- Soulful BlueΔE00 2.907 · #757c91
- Tranquil PondΔE00 2.936 · #768294
- Velvet CurtainΔE00 2.943 · #7e85a3
- Stand OutΔE00 2.943 · #7f8596
- RomanesqueΔE00 2.98 · #7983a4
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.