#3300FF Color

#3300FF is rgb(51, 0, 255) in RGB, hsl(252, 100%, 50%) in HSL, and about cmyk(80%, 100%, 0%, 0%) in CMYK. It has no registered color name of its own — the closest is Ultramarine (#3F00FF), below the threshold most people can see at ΔE 1.73. White text is the more readable choice on this background.

#3300FF

HEX#3300FF

RGBrgb(51, 0, 255)

HSLhsl(252, 100%, 50%)

HSVhsv(252, 100%, 100%)

CMYKcmyk(80%, 100%, 0%, 0%)

OKLCHoklch(46.6% 0.304 270.7)

LABlab(31.34% 69.25 -109.01)

LCHlch(31.34% 129.15 302.43)

What #3300FF Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #3300FF, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Ultramarine#3F00FFΔE 1.73 Indigo (Color Wheel)#4000FFΔE 1.89 Blue#0000FFΔE 3.63 Ultramarine Blue(caran D'ache)#2111EFΔE 9.08 Han Purple#5218FAΔE 9.65 Electric Indigo#6F00FFΔE 11.97

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

#3300FF Channel Values

How #3300FF 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 51 · G 0 · B 255	8-bit channels as sent to the display
HSL	H 252° · S 100% · L 50%	Easiest model for building lighter and darker variants
HSV	H 252° · S 100% · V 100%	Matches the picker in most design tools
CMYK	C 80% · M 100% · Y 0% · K 0%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	8.12:1 vs white · 2.58:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #3300FF 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 text8.12:1AA normal AA large AAA normal

Fails AABlack text2.58:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #3300FF in the contrast checker.

Colors That Go With #3300FF

Pairings derived from color-wheel relationships. The complementary color sits opposite #3300FF; 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 #3300FF

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 #3300FF.

How #3300FF 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#3300FF

Protanopia#1111FF

Protanomaly#230BFF

Deuteranopia#1B1BFF

Deuteranomaly#2613FF

Tritanopia#006363

Tritanomaly#004EB7

Achromatopsia#505050

Test a full palette in the color blindness simulator.

Using #3300FF in Code

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

CSS custom property--color-3300ff: #3300FF;

CSS backgroundbackground-color: #3300FF;

Tailwind configcolors: { 'color-3300ff': '#3300FF' }

SwiftUIColor(red: 0.200, green: 0.000, blue: 1.000)

Android XML<color name="color_3300ff">#3300FF</color>

SVG fillfill="#3300FF"

More Blue Colors

#3300FF sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

333366 32527b 333399 324ab2 3333cc 318ce7 3333ff 314158 336084 312c85 336699 2f3e4d 434c56 5946b2 6f63bb 88ace0 a4c0f4 c4d8e8 e3e0f5 00005c 0033ff 035096 130e2f 1f1fff

#3300FF Frequently Asked Questions

What color is #3300FF?

#3300FF is a mid-tone blue — rgb(51, 0, 255) in RGB and hsl(252, 100%, 50%) in HSL. It carries no registered color name of its own; the closest named color is Ultramarine (#3F00FF), which is below the threshold most people can see at a CIE76 distance of 1.73.

What is the RGB value of #3300FF?

#3300FF is rgb(51, 0, 255) — red 51, green 0, and blue 255 on the 0-255 scale.

What is the CMYK value of #3300FF?

#3300FF converts to approximately cmyk(80%, 100%, 0%, 0%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #3300FF be black or white?

White text is the more readable choice. #3300FF scores 8.12:1 against white and 2.58:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #3300FF as a CSS color keyword?

No. #3300FF 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 blue (#0000FF) at a CIE76 distance of 3.63, which is very hard to tell apart.

Open #3300FF 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.