#3333CC Color

#3333CC is rgb(51, 51, 204) in RGB, hsl(240, 60%, 50%) in HSL, and about cmyk(75%, 75%, 0%, 20%) in CMYK. It has no registered color name of its own — the closest is Iridescent Indigo (#3C32CD), below the threshold most people can see at ΔE 1.95. White text is the more readable choice on this background.

#3333CC

HEX#3333CC

RGBrgb(51, 51, 204)

HSLhsl(240, 60%, 50%)

HSVhsv(240, 75%, 80%)

CMYKcmyk(75%, 75%, 0%, 20%)

OKLCHoklch(44.2% 0.226 272.3)

LABlab(31.28% 41.31 -80.04)

LCHlch(31.28% 90.07 297.30)

What #3333CC 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 #3333CC, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Iridescent Indigo#3C32CDΔE 1.95 Palatinate Blue#273BE2ΔE 8.19 Blue (Pantone)#0018A8ΔE 11.47 Zaffer (Zaffre)#0014A8ΔE 12.08 Persian Blue#1C39BBΔE 13.35 Blue Ribbon#0B10A2ΔE 13.52

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

#3333CC Channel Values

How #3333CC 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 51 · B 204	8-bit channels as sent to the display
HSL	H 240° · S 60% · L 50%	Easiest model for building lighter and darker variants
HSV	H 240° · S 75% · V 80%	Matches the picker in most design tools
CMYK	C 75% · M 75% · Y 0% · K 20%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	8.45:1 vs white · 2.49:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #3333CC 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 text8.45:1AA normal AA large AAA normal

Fails AABlack text2.49:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #3333CC in the contrast checker.

Colors That Go With #3333CC

Pairings derived from color-wheel relationships. The complementary color sits opposite #3333CC; 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 #3333CC

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 #3333CC.

How #3333CC 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#3333CC

Protanopia#3333CC

Protanomaly#3333CC

Deuteranopia#3333CC

Deuteranomaly#3333CC

Tritanopia#005B5B

Tritanomaly#004E96

Achromatopsia#4D4D4D

Test a full palette in the color blindness simulator.

Using #3333CC in Code

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

CSS custom property--color-3333cc: #3333CC;

CSS backgroundbackground-color: #3333CC;

Tailwind configcolors: { 'color-3333cc': '#3333CC' }

SwiftUIColor(red: 0.200, green: 0.200, blue: 0.800)

Android XML<color name="color_3333cc">#3333CC</color>

SVG fillfill="#3333CC"

More Blue Colors

#3333CC sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

3333ff 333399 336084 333366 336699 3300ff 3366cc 32527b 3366ff 324ab2 3399cc 318ce7 45556c 5b92e5 71a6d2 8ba8b7 a7b9f1 c5d4e7 e6e6fa 000070 0038a8 052f4a 1447e6 21314a

#3333CC Frequently Asked Questions

What color is #3333CC?

#3333CC is a mid-tone blue — rgb(51, 51, 204) in RGB and hsl(240, 60%, 50%) in HSL. It carries no registered color name of its own; the closest named color is Iridescent Indigo (#3C32CD), which is below the threshold most people can see at a CIE76 distance of 1.95.

What is the RGB value of #3333CC?

#3333CC is rgb(51, 51, 204) — red 51, green 51, and blue 204 on the 0-255 scale.

What is the CMYK value of #3333CC?

#3333CC converts to approximately cmyk(75%, 75%, 0%, 20%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #3333CC be black or white?

White text is the more readable choice. #3333CC scores 8.45:1 against white and 2.49:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #3333CC as a CSS color keyword?

No. #3333CC 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 20.35, which is visibly different.

Open #3333CC 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.