#0033CC Color

#0033CC is rgb(0, 51, 204) in RGB, hsl(225, 100%, 40%) in HSL, and about cmyk(100%, 75%, 0%, 20%) in CMYK. It has no registered color name of its own — the closest is Iridescent Indigo (#3C32CD), clearly related but distinguishable side by side at ΔE 6.45. White text is the more readable choice on this background.

#0033CC

HEX#0033CC

RGBrgb(0, 51, 204)

HSLhsl(225, 100%, 40%)

HSVhsv(225, 100%, 80%)

CMYKcmyk(100%, 75%, 0%, 20%)

OKLCHoklch(42.6% 0.235 263.7)

LABlab(29.50% 38.13 -83.05)

LCHlch(29.50% 91.39 294.66)

What #0033CC 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 #0033CC, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Iridescent Indigo#3C32CDΔE 6.45 Palatinate Blue#273BE2ΔE 7.76 Blue (Pantone)#0018A8ΔE 11.59 Zaffer (Zaffre)#0014A8ΔE 12.3 Persian Blue#1C39BBΔE 13.15 Blue Ribbon#0B10A2ΔE 14.08

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

#0033CC Channel Values

How #0033CC 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 0 · G 51 · B 204	8-bit channels as sent to the display
HSL	H 225° · S 100% · L 40%	Easiest model for building lighter and darker variants
HSV	H 225° · S 100% · V 80%	Matches the picker in most design tools
CMYK	C 100% · M 75% · Y 0% · K 20%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	8.95:1 vs white · 2.35:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #0033CC 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 text8.95:1AA normal AA large AAA normal

Fails AABlack text2.35:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #0033CC in the contrast checker.

Colors That Go With #0033CC

Pairings derived from color-wheel relationships. The complementary color sits opposite #0033CC; 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 #0033CC

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 #0033CC.

How #0033CC 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#0033CC

Protanopia#2E2ECC

Protanomaly#2330CC

Deuteranopia#2929CC

Deuteranomaly#1E2DCC

Tritanopia#005B5B

Tritanomaly#004E96

Achromatopsia#494949

Test a full palette in the color blindness simulator.

Using #0033CC in Code

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

CSS custom property--color-0033cc: #0033CC;

CSS backgroundbackground-color: #0033CC;

Tailwind configcolors: { 'color-0033cc': '#0033CC' }

SwiftUIColor(red: 0.000, green: 0.200, blue: 0.800)

Android XML<color name="color_0033cc">#0033CC</color>

SVG fillfill="#0033CC"

More Blue Colors

#0033CC sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

0033ff 003399 00356b 003366 0038a7 003153 0038a8 003061 00416a 002e57 004285 002395 032b45 12279e 1f1f9e 2e2d88 3d729e 525e6b 6699ff 80bfff 9bddff bedbff ddd6ff 00001f

#0033CC Frequently Asked Questions

What color is #0033CC?

#0033CC is a mid-tone blue — rgb(0, 51, 204) in RGB and hsl(225, 100%, 40%) in HSL. It carries no registered color name of its own; the closest named color is Iridescent Indigo (#3C32CD), which is clearly related but distinguishable side by side at a CIE76 distance of 6.45.

What is the RGB value of #0033CC?

#0033CC is rgb(0, 51, 204) — red 0, green 51, and blue 204 on the 0-255 scale.

What is the CMYK value of #0033CC?

#0033CC converts to approximately cmyk(100%, 75%, 0%, 20%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #0033CC be black or white?

White text is the more readable choice. #0033CC scores 8.95:1 against white and 2.35:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #0033CC as a CSS color keyword?

No. #0033CC 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 20.92, which is visibly different.

Open #0033CC 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.