#0066CC Color

#0066CC is rgb(0, 102, 204) in RGB, hsl(210, 100%, 40%) in HSL, and about cmyk(100%, 50%, 0%, 20%) in CMYK. It has no registered color name of its own — the closest is Denim (#1560BD), clearly related but distinguishable side by side at ΔE 5.38. White text is the more readable choice on this background.

#0066CC

HEX#0066CC

RGBrgb(0, 102, 204)

HSLhsl(210, 100%, 40%)

HSVhsv(210, 100%, 80%)

CMYKcmyk(100%, 50%, 0%, 20%)

OKLCHoklch(52.2% 0.177 255.8)

LABlab(43.04% 6.77 -60.89)

LCHlch(43.04% 61.27 276.35)

What #0066CC 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 #0066CC, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Denim#1560BDΔE 5.38 Han Blue#446CCFΔE 7.2 Bright Navy Blue#1974D2ΔE 8.08 True Blue#0073CFΔE 9.07 Sapphire#0F52BAΔE 9.57 Microsoft Edge Blue#0078D7ΔE 9.59

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

#0066CC Channel Values

How #0066CC 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 102 · B 204	8-bit channels as sent to the display
HSL	H 210° · S 100% · L 40%	Easiest model for building lighter and darker variants
HSV	H 210° · S 100% · V 80%	Matches the picker in most design tools
CMYK	C 100% · M 50% · Y 0% · K 20%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	5.57:1 vs white · 3.77:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #0066CC 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 text5.57:1AA normal AA large AAA normal

Fails AABlack text3.77:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #0066CC in the contrast checker.

Colors That Go With #0066CC

Pairings derived from color-wheel relationships. The complementary color sits opposite #0066CC; 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 #0066CC

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 #0066CC.

How #0066CC 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#0066CC

Protanopia#5D5DCC

Protanomaly#4961CC

Deuteranopia#5454CD

Deuteranomaly#415CCC

Tritanopia#007979

Tritanomaly#0072A1

Achromatopsia#686868

Test a full palette in the color blindness simulator.

Using #0066CC in Code

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

CSS custom property--color-0066cc: #0066CC;

CSS backgroundbackground-color: #0066CC;

Tailwind configcolors: { 'color-0066cc': '#0066CC' }

SwiftUIColor(red: 0.000, green: 0.400, blue: 0.800)

Android XML<color name="color_0066cc">#0066CC</color>

SVG fillfill="#0066CC"

More Blue Colors

#0066CC sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

0066ff 006699 0067a5 00598a 0069a8 0057ad 0069d1 00549e 006db0 0048ba 0070b8 0047ab 0a0a2e 181c20 23a5f6 3333ff 456fa5 5c5cff 72a0c1 8c7af0 a7dbfb c6d2ff e7e3fc 00007a

#0066CC Frequently Asked Questions

What color is #0066CC?

#0066CC is a mid-tone blue — rgb(0, 102, 204) in RGB and hsl(210, 100%, 40%) in HSL. It carries no registered color name of its own; the closest named color is Denim (#1560BD), which is clearly related but distinguishable side by side at a CIE76 distance of 5.38.

What is the RGB value of #0066CC?

#0066CC is rgb(0, 102, 204) — red 0, green 102, and blue 204 on the 0-255 scale.

What is the CMYK value of #0066CC?

#0066CC converts to approximately cmyk(100%, 50%, 0%, 20%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #0066CC be black or white?

White text is the more readable choice. #0066CC scores 5.57:1 against white and 3.77:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #0066CC as a CSS color keyword?

No. #0066CC 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 royalblue (#4169E1) at a CIE76 distance of 12.99, which is visibly different.

Open #0066CC 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.