#3399CC Color

#3399CC is rgb(51, 153, 204) in RGB, hsl(200, 60%, 50%) in HSL, and about cmyk(75%, 25%, 0%, 20%) in CMYK. It has no registered color name of its own — the closest is Carolina Blue (#4B9CD3), very hard to tell apart at ΔE 4.8. Black text is the more readable choice on this background.

#3399CC

HEX#3399CC

RGBrgb(51, 153, 204)

HSLhsl(200, 60%, 50%)

HSVhsv(200, 75%, 80%)

CMYKcmyk(75%, 25%, 0%, 20%)

OKLCHoklch(64.8% 0.119 235)

LABlab(59.19% -16.95 -35.28)

LCHlch(59.19% 39.14 244.33)

What #3399CC 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 #3399CC, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Carolina Blue#4B9CD3ΔE 4.8 Twitter Blue#26A7DEΔE 6.33 Rich Electric Blue#0892D0ΔE 6.98 Blue (NCS)#0087BDΔE 7.23 Picton Blue#45B1E8ΔE 9 Cerulean (Crayola)#1DACD6ΔE 10.79

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

#3399CC Channel Values

How #3399CC 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 153 · B 204	8-bit channels as sent to the display
HSL	H 200° · S 60% · L 50%	Easiest model for building lighter and darker variants
HSV	H 200° · S 75% · V 80%	Matches the picker in most design tools
CMYK	C 75% · M 25% · Y 0% · K 20%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	3.2:1 vs white · 6.57:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #3399CC 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.

Fails AAWhite text3.2:1AA normal AA large AAA normal

TextBlack text6.57:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #3399CC in the contrast checker.

Colors That Go With #3399CC

Pairings derived from color-wheel relationships. The complementary color sits opposite #3399CC; 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 #3399CC

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 #3399CC.

How #3399CC 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#3399CC

Protanopia#8E8ECC

Protanomaly#7492CC

Deuteranopia#8282CD

Deuteranomaly#6B8CCD

Tritanopia#00A1A1

Tritanomaly#1C9EB4

Achromatopsia#909090

Test a full palette in the color blindness simulator.

Using #3399CC in Code

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

CSS custom property--color-3399cc: #3399CC;

CSS backgroundbackground-color: #3399CC;

Tailwind configcolors: { 'color-3399cc': '#3399CC' }

SwiftUIColor(red: 0.200, green: 0.600, blue: 0.800)

Android XML<color name="color_3399cc">#3399CC</color>

SVG fillfill="#3399CC"

More Blue Colors

#3399CC sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

3399ff 3366ff 352d67 3366cc 353d45 336699 364153 336084 36454f 3333ff 365781 3333cc 483d8b 5d94c0 766ec8 8fa6bc adadff cec8ef edf2f7 00009c 0057ad 082567 172436 23108e

#3399CC Frequently Asked Questions

What color is #3399CC?

#3399CC is a mid-tone blue — rgb(51, 153, 204) in RGB and hsl(200, 60%, 50%) in HSL. It carries no registered color name of its own; the closest named color is Carolina Blue (#4B9CD3), which is very hard to tell apart at a CIE76 distance of 4.8.

What is the RGB value of #3399CC?

#3399CC is rgb(51, 153, 204) — red 51, green 153, and blue 204 on the 0-255 scale.

What is the CMYK value of #3399CC?

#3399CC converts to approximately cmyk(75%, 25%, 0%, 20%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #3399CC be black or white?

Black text is the more readable choice. #3399CC scores 3.2:1 against white and 6.57:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #3399CC as a CSS color keyword?

No. #3399CC 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 steelblue (#4682B4) at a CIE76 distance of 11.47, which is visibly different.

Open #3399CC 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.