Neon Blue Color Codes
Neon Blue is a mid-tone, vivid azure blue with the hex code #4666FF, RGB values of 70, 102, 255 and an HSL value of hsl(230, 100%, 64%).
| HEX | #4666FF |
|---|---|
| RGB | 70, 102, 255 |
| HSL | hsl(230, 100%, 64%) |
| HSV | 230°, 73%, 100% |
| CMYK | 73%, 60%, 0%, 0% |
| LAB | 49.52, 39.30, -79.29 |
| CIELCHuv | 49.52, 124.31, 262.57° |
- Nearest Pantone
- PMS 2728 C ΔE 24.2 · approximate
- Nearest CSS name
-
mediumslateblueΔE 14.3
Source Wikipedia, List of colors
Neon Blue Color Hex Code
The Neon Blue color hex code is #4666FF. Those six digits are three pairs, 46 for red, 66 for green and FF for blue, which is the same triplet a browser reads from the CSS value below.
#4666FF
Neon Blue Color RGB Code
The Neon Blue RGB code is rgb(70, 102, 255). Blue carries the most light at 255 of 255, which is what puts this color where it sits on the wheel.
rgb(70, 102, 255)
Neon Blue Color HSV Code
The Neon Blue HSV code is 230°, 73%, 100%. Read it as a hue of 230 degrees, 73% saturation and 100% value, which is the form most color pickers use because moving one number changes one thing.
230°, 73%, 100%
Neon Blue Color CIELChuv Code
The Neon Blue CIELCHuv code is 49.52, 124.31, 262.57°. Unlike hex or RGB this one is perceptual: lightness 50 means mid-toned to the eye rather than to the screen, and chroma 124 is how far it sits from grey.
49.52, 124.31, 262.57°
Tonal scale
What are Neon Blue Color Palettes?
A shade mixes toward black, a tint toward white, a tone toward grey. Every step keeps the hue and is copy-ready.
Shades, toward black
Tints, toward white
Tones, toward grey
Palettes
What are Neon Blue Color Palette Codes?
Each of these is a hue rotation from #4666FF. They are generated, not curated, so they are exact.
Complementary
The opposite hue is #FFDF46, a very light, vivid amber. Complements carry the strongest contrast of any two-color scheme, so this pair suits a call to action better than a background. Both are saturated, so give the complement much less area than the base or the two will fight.
Analogous
Its two neighbours are #46C3FF and #8346FF. Because they overlap heavily in hue, nothing in the group competes, and the eye reads the whole set as a single color with variation.
Triadic
#FF4666 and #66FF46 complete an even 120 degree split. Three fully independent hues, so one has to lead: keep this base dominant and let the other two appear in small quantities.
Split-complementary
Instead of the direct complement, this takes the two hues either side of it: #FF8346 and #C3FF46. Almost the same contrast, without the edge shimmer a true complementary pair produces at high saturation.
Tetradic
Two complementary pairs forming a rectangle: this base with #FFDF46, and #FF46C3 with #46FF83. The richest of the five and the hardest to balance, so treat the darkest of the four as the lead and hold the other three well back.
Accessibility
Contrast checker: is Neon Blue accessible?
Measured against white and against black, with a separate verdict for each element type. Small text, large text and UI components have different thresholds, so one pass or fail for the whole color would be wrong roughly a third of the time.
White background
4.56:14.56
contrast ratio on white background
| Element | AA | AAA |
|---|---|---|
| Small text needs 4.5:1 / 7:1 | Passes | Fails |
| Large text needs 3:1 / 4.5:1 | Passes | Passes |
| UI component needs 3:1 | Passes | n/a |
Black background
4.60:14.60
contrast ratio on black background
| Element | AA | AAA |
|---|---|---|
| Small text needs 4.5:1 / 7:1 | Passes | Fails |
| Large text needs 3:1 / 4.5:1 | Passes | Passes |
| UI component needs 3:1 | Passes | n/a |
Neon Blue clears WCAG AA against white at 4.56:1, so it is safe for body copy as well as headings. Text placed on it should be black, which gives 4.60:1. It is a highly saturated color, so it will dominate anything it sits beside. Give it space rather than surrounding it with other strong colors.
Color vision
How Neon Blue looks with color blindness
Around 300 million people see color differently from the way it is specified. Each card shows the actual color beside how it appears, and how common that form of vision is.
Protanopia
About 1% of men#5656E6
Neon Blue shifts slightly here. ΔE 8.5
No working red cones. Reds darken sharply and drift toward the same muddy olive as green.
Deuteranopia
About 1% of men#5451DF
Neon Blue shifts noticeably here. ΔE 10.5
No working green cones. With the milder deuteranomaly at nearer 6% of men, this is by far the most common form, and the one worth designing around.
Tritanopia
About 1 in 10,000#48CFCA
Neon Blue changes substantially here. ΔE 107.6
No working blue cones. Blues shift toward green and yellows toward pink. Rare, and unlike the others it is not sex-linked, so it affects men and women equally.
Achromatopsia
About 1 in 30,000#767676
Neon Blue changes substantially here. ΔE 88.5
No color vision at all. Also a fair proxy for how the color survives a greyscale print or a failing screen.
To a deuteranope, the most common form, Neon Blue reads as #5451DF. That is a shift of ΔE 10.5, so it is a different color to roughly one man in sixteen. Blues survive red-green deficiency well, which is why so much interface design leans on them. The form to watch here is tritanopia, though at roughly 1 in 10,000 it affects far fewer people. The widest shift is under tritanopia, at ΔE 107.6. The rule this leads to needs no simulator: never let color be the only thing carrying a message. Add a label, an icon, or a clear difference in lightness, and the problem disappears for everyone.
Snippets
Using Neon Blue in code
:root {
--neon-blue: #4666FF;
}
.example {
color: var(--neon-blue);
}// tailwind.config.js
theme: {
extend: {
colors: {
'neon-blue': '#4666FF',
},
},
}// SwiftUI takes 0–1 components, not 0–255.
let neonBlue = Color(
red: 0.275,
green: 0.400,
blue: 1.000
)<!-- res/values/colors.xml -->
<color name="neon_blue">#4666FF</color>// Flutter wants ARGB: FF for full opacity, then the hex.
const neonBlue = Color(0xFF4666FF);