Neon Blue (#1B03A3)

The hex code for Neon Blue is #1B03A3. It is rgb(27, 3, 163) in RGB, hsl(249, 96%, 33%) in HSL, and about cmyk(83%, 98%, 0%, 36%) in CMYK — a dark blue. White text is the more readable choice on this background.

#1B03A3

HEX#1B03A3

RGBrgb(27, 3, 163)

HSLhsl(249, 96%, 33%)

HSVhsv(249, 98%, 64%)

CMYKcmyk(83%, 98%, 0%, 36%)

OKLCHoklch(33.5% 0.217 270)

LABlab(18.05% 48.61 -77.70)

LCHlch(18.05% 91.65 302.03)

Colors Closest to Neon Blue

Neon Blue is a registered color name. These are the named colors nearest to it, measured as CIE76 distance in CIELAB — a perceptual scale, so the ordering matches what the eye sees rather than how close the raw RGB numbers happen to sit.

Duke Blue#00009CΔE 2.8 Blue Ribbon#0B10A2ΔE 4.99 Zaffer (Zaffre)#0014A8ΔE 5.32 Blue (Pantone)#0018A8ΔE 7.16 Websafe Indigo#330099ΔE 7.23 Dark Blue#00008BΔE 9.6

Browse the full index of named colors A-Z or every blue in the library.

#1B03A3 Channel Values

How Neon Blue breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 27 · G 3 · B 163	8-bit channels as sent to the display
HSL	H 249° · S 96% · L 33%	Easiest model for building lighter and darker variants
HSV	H 249° · S 98% · V 64%	Matches the picker in most design tools
CMYK	C 83% · M 98% · Y 0% · K 36%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	13.22:1 vs white · 1.59:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a Neon Blue background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

TextWhite text13.22:1AA normal ✓AA large ✓AAA normal ✓

TextBlack text1.59:1AA normal ✗AA large ✗AAA normal ✗

Need a specific ratio against another background? Open #1B03A3 in the contrast checker.

Colors That Go With Neon Blue

Pairings derived from color-wheel relationships. The complementary color sits opposite Neon Blue; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of Neon Blue

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #1B03A3.

How Neon Blue Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#1B03A3

Protanopia#0909A3

Protanomaly#1206A3

Deuteranopia#0E0EA3

Deuteranomaly#140AA3

Tritanopia#003D3D

Tritanomaly#002F74

Achromatopsia#303030

Test a full palette in the color blindness simulator.

Using #1B03A3 in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--neon-blue: #1B03A3;

CSS backgroundbackground-color: #1B03A3;

Tailwind configcolors: { 'neon-blue': '#1B03A3' }

SwiftUIColor(red: 0.106, green: 0.012, blue: 0.639)

Android XML<color name="neon_blue">#1B03A3</color>

SVG fillfill="#1B03A3"

More Blue Colors

Neon Blue sits in the bluefamily. These are its neighbours across that family's full range, each with its own breakdown.

1c398e 1a5ddb 1c39bb 1974d2 1d293d 193cb8 1d2951 191980 1d44b9 191970 1e174a 191632 2929ff 3719e1 4d4dff 64609a 7abdff 97a3af b8dbff d3edfd f3f4f6 0000eb 0069d1 0c0c3c

#1B03A3 Frequently Asked Questions

What is the hex code for Neon Blue?

The hex code for Neon Blue is #1B03A3. That is rgb(27, 3, 163) in RGB, hsl(249, 96%, 33%) in HSL, and approximately cmyk(83%, 98%, 0%, 36%) in CMYK.

What is the RGB value of #1B03A3?

#1B03A3 is rgb(27, 3, 163) — red 27, green 3, and blue 163 on the 0-255 scale.

What is the CMYK value of #1B03A3?

#1B03A3 converts to approximately cmyk(83%, 98%, 0%, 36%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #1B03A3 be black or white?

White text is the more readable choice. #1B03A3 scores 13.22:1 against white and 1.59:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #1B03A3 as a CSS color keyword?

No. #1B03A3 is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is darkblue (#00008B) at a CIE76 distance of 9.6, which is clearly related but distinguishable side by side.

Open Neon Blue in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

Keep exploring: every blue in the color library, the guide to shades of blue, or the full color library.