#000042 Color

#000042 is rgb(0, 0, 66) in RGB, hsl(240, 100%, 13%) in HSL, and about cmyk(100%, 100%, 0%, 74%) in CMYK. It has no registered color name of its own — the closest is Sapphire Navy (#082567), visibly different at ΔE 15.03. White text is the more readable choice on this background.

#000042

HEX#000042

RGBrgb(0, 0, 66)

HSLhsl(240, 100%, 13%)

HSVhsv(240, 100%, 26%)

CMYKcmyk(100%, 100%, 0%, 74%)

OKLCHoklch(17.1% 0.119 264.1)

LABlab(2.98% 18.61 -39.52)

LCHlch(2.98% 43.69 295.22)

What #000042 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 #000042, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Sapphire Navy#082567ΔE 15.03 Russian Violet#32174DΔE 16.3 Midnight Blue#191970ΔE 18.06 St. Patrick's Blue#23297AΔE 19.63 Oxford Blue#002147ΔE 22.57 Space Cadet#1D2951ΔE 23.13

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

#000042 Channel Values

How #000042 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 0 · B 66	8-bit channels as sent to the display
HSL	H 240° · S 100% · L 13%	Easiest model for building lighter and darker variants
HSV	H 240° · S 100% · V 26%	Matches the picker in most design tools
CMYK	C 100% · M 100% · Y 0% · K 74%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	19.47:1 vs white · 1.08:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #000042 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 text19.47:1AA normal AA large AAA normal

Fails AABlack text1.08:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #000042 in the contrast checker.

Colors That Go With #000042

Pairings derived from color-wheel relationships. The complementary color sits opposite #000042; 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 #000042

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 #000042.

How #000042 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#000042

Protanopia#000042

Protanomaly#000042

Deuteranopia#000042

Deuteranomaly#000042

Tritanopia#001414

Tritanomaly#000D2D

Achromatopsia#0D0D0D

Test a full palette in the color blindness simulator.

Using #000042 in Code

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

CSS custom property--color-000042: #000042;

CSS backgroundbackground-color: #000042;

Tailwind configcolors: { 'color-000042': '#000042' }

SwiftUIColor(red: 0.000, green: 0.000, blue: 0.259)

Android XML<color name="color_000042">#000042</color>

SVG fillfill="#000042"

More Blue Colors

#000042 sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000047 000038 000052 000033 000057 00002e 00005c 000024 000061 00001f 000066 fafaff 003153 020618 113c8d 1e1a4d 2c2555 3b77e8 4f86f7 6666cc 7c9ed9 99a1af bcd4e6 dbeafe

#000042 Frequently Asked Questions

What color is #000042?

#000042 is a darkest blue — rgb(0, 0, 66) in RGB and hsl(240, 100%, 13%) in HSL. It carries no registered color name of its own; the closest named color is Sapphire Navy (#082567), which is visibly different at a CIE76 distance of 15.03.

What is the RGB value of #000042?

#000042 is rgb(0, 0, 66) — red 0, green 0, and blue 66 on the 0-255 scale.

What is the CMYK value of #000042?

#000042 converts to approximately cmyk(100%, 100%, 0%, 74%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #000042 be black or white?

White text is the more readable choice. #000042 scores 19.47:1 against white and 1.08:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #000042 as a CSS color keyword?

No. #000042 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 midnightblue (#191970) at a CIE76 distance of 18.06, which is visibly different.

Open #000042 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.