Medium Blue Color Code: #0000CD, RGB & HSL

Medium Blue color values

HEX #0000CD

RGB rgb(0, 0, 205)

HSL hsl(240, 100%, 40%)

HSV 240, 100%, 80%

HWB hwb(240 0% 20%)

CMYK 100%, 100%, 0%, 20%

Decimal 205

CSS keyword mediumblue

40%HSL lightness (medium-dark)

100%HSL saturation (vivid)

240°Hue angle (blue)

0.044Relative luminance

CMYK is a standard screen-to-print conversion. Printed results depend on inks, paper and color profiles.

What is Medium Blue?

Medium Blue is one of the named colors defined by the CSS Color specifications (keyword “mediumblue”), so every modern browser understands it without a hex code.

Its hue angle of 240° places it in the blue part of the color wheel, with 100% saturation (vivid) and 40% lightness (medium-dark). It is a cool color.

Compared with the other blue colors in the Aqeeb Studio library, it is lighter than 31% of them and more saturated than 87% of them.

Its relative luminance is 0.044, which makes it a dark color. That is below the 0.179 crossover point at which black and white text have equal contrast, so white text has the advantage.

Medium Blue counts as a dark color: its HSL lightness is 40% and its relative luminance is 0.044. White text reads comfortably on it (11.16:1 contrast).

Text contrast on Medium Blue

WCAG contrast of white and black text on Medium Blue
Text	Preview	Ratio	AA normal	AA large	AAA normal	AAA large
White text	Sample text	11.16:1 Excellent	Pass	Pass	Pass	Pass
Black text	Sample text	1.88:1 Poor	Fail	Fail	Fail	Fail

Ratios use the WCAG 2 formula and are truncated, never rounded up. Test any pair with the contrast checker.

Colors that go with Medium Blue

Complementary color

Complementary colors sit directly opposite each other on the color wheel (180° apart). They give the strongest hue contrast, which suits calls to action and accents.

≈ Olive Yellow#CDCD00

Analogous colors

Analogous colors are neighbors on the wheel, 30° either side of the base hue. They blend smoothly and are easy to combine in backgrounds, gradients and illustrations.

≈ Royal Blue#0067CD ≈ Violet Blue#6700CD

Triadic colors

A triadic scheme uses three hues spaced 120° apart. It is lively yet balanced, and works best when one color leads and the other two act as accents.

≈ Tomato Red#CD0000 ≈ Vibrant Green#00CD00

Split-complementary colors

Split-complementary keeps the base color and uses the two colors on either side of its complement (150° and 210°). The contrast is strong but gentler than a direct complement.

≈ Orange Brown#CD6700 ≈ Apple Green#67CD00

Tetradic colors

A tetradic (rectangle) scheme combines two complementary pairs at 0°, 60°, 180° and 240°. It offers variety but needs one dominant color to stay balanced.

≈ Purple Pink#CD00CD ≈ Olive Yellow#CDCD00 ≈ Vibrant Green#00CD00

Monochromatic variants

Monochromatic variants keep the same hue and saturation and only change lightness, which makes them dependable for UI scales and subtle layered designs.

#00003E#00003E

#000086#000086

#0000CD#0000CD

#1515FF#1515FF

#5D5DFF#5D5DFF

A “≈” before a name means the exact harmony color has no named match, so the link goes to the closest named color.

Tints and shades of Medium Blue

Lighter tints (mixed with white)

Darker shades (mixed with black)

Select any swatch to copy its HEX code. Build longer scales with the tints and shades tool.

True Blue#010FCC Ultramarine Blue#1805DB Pure Blue#0203E2 Violet Blue#510AC9 Ultramarine#2000B1 Light Royal Blue#3A2EFE Vivid Blue#152EFF Rich Blue#021BF9

Where to use Medium Blue

Button, banner and badge backgrounds with white text (11.16:1 contrast)
Accents that need to stand out: call-to-action buttons, charts and illustrations
Charts and dashboards
Links, buttons and primary interface accents
Corporate, finance and software branding
Headers and navigation bars

Use Medium Blue in CSS

:root {
  --color-medium-blue: #0000CD;
}

.element {
  color: var(--color-medium-blue);
  background-color: #0000CD;
  border: 2px solid #0000CD;
}

Questions about Medium Blue

What is the HEX code for Medium Blue?

Medium Blue is #0000CD.

What is the RGB value of Medium Blue?

The RGB value of Medium Blue is 0, 0, 205: 0 red, 0 green and 205 blue on a 0–255 scale, written rgb(0, 0, 205) in CSS.

What is the HSL value of Medium Blue?

The HSL value of Medium Blue is 240°, 100%, 40% (hue, saturation, lightness), written hsl(240, 100%, 40%) in CSS.

What is the CMYK value of Medium Blue?

A standard conversion gives about C 100%, M 100%, Y 0%, K 20%. Real print results depend on the inks, paper and color profile, so treat CMYK here as a reference value.

Is Medium Blue a light or dark color?

Medium Blue counts as a dark color: its HSL lightness is 40% and its relative luminance is 0.044. White text reads comfortably on it (11.16:1 contrast).

How does Medium Blue look with white text?

White text on Medium Blue has a contrast ratio of 11.16:1, rated Excellent. It meets WCAG AA for normal text.

How does Medium Blue look with black text?

Black text on Medium Blue has a contrast ratio of 1.88:1, rated Poor. It falls below the WCAG minimum for text.

What colors go well with Medium Blue?

Olive Yellow is its complementary color, and Royal Blue sits beside it as an analogous color. Lighter and darker variants of the same hue also work well for monochromatic palettes.

Where can Medium Blue be used?

It suits button, banner and badge backgrounds with white text (11.16:1 contrast); accents that need to stand out: call-to-action buttons, charts and illustrations; charts and dashboards.

How do I use Medium Blue in CSS?

Use color: #0000CD; for text, background-color: #0000CD; for fills, or define a custom property such as --color-medium-blue: #0000CD; and reuse it with var(--color-medium-blue).

About this color page

CSS named color (W3C CSS Color Module). Values are calculated from the HEX code; color names are labels, not trademarks or standards unless stated. Screens render colors differently, so always check important colors on your own device. See the disclaimer.

Medium Blue Color Code: #0000CD