Opulent Blue
#0055ee
A blue that is about as vivid as sRGB can show at this lightness. It is mid — the hardest range to put text on, either colour struggles.
Hex
#0055ee
RGB
0, 85, 238
OKLCh
51.7% 0.240 262.0°
CIELAB (D50)
40.7, 28.7, -84.0
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It sits exactly on the sRGB boundary: at this lightness and hue the gamut has nothing left, and a wider display would show a more colourful version of it.
- As text on white it measures APCA Lc 78.5; on black, Lc -23.3. 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 6.9 and 7.2 and 8.5 — no red cone.
Text on this colour
White text
5.94:1 — passes AA
Black text
3.53:1 — large text only
White text is the better of the two at5.94:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#0055ee
protanopia
#5050ee · ΔE00 6.9
deuteranopia
#4848ee · ΔE00 7.2
tritanopia
#3d3dff · ΔE00 8.5
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isMegaman Helmet at ΔE00 1.492: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Megaman HelmetΔE00 1.492 · #0058f8
- Nīlā BlueΔE00 1.893 · #0055ff
- Frosted BlueberriesΔE00 1.91 · #0055dd
- Veteran’s Day BlueΔE00 1.916 · #2e58e8
- Chun-Li BlueΔE00 2.128 · #1559db
- Blue et une NuitΔE00 2.163 · #0652ff
- Light Shōjin BlueΔE00 2.167 · #1155ff
- AzulΔE00 2.441 · #1d5dec
- Bnei Brak BayΔE00 2.747 · #1d5bd6
- YInMn BlueΔE00 3.326 · #265ef7
- Dead Blue EyesΔE00 3.82 · #0055cc
- Pacific BridgeΔE00 3.9 · #0052cc
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.