Rich Blue Color Code: #021BF9, RGB & HSL

Rich Blue color values

HEX #021BF9

RGB rgb(2, 27, 249)

HSL hsl(234, 98%, 49%)

HSV 234, 99%, 98%

HWB hwb(234 1% 2%)

CMYK 99%, 89%, 0%, 2%

Decimal 138233

49%HSL lightness (medium)

98%HSL saturation (vivid)

234°Hue angle (blue)

0.076Relative luminance

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

What is Rich Blue?

“Rich Blue” is a crowd-sourced name from the XKCD Color Survey, in which participants typed names for colors they were shown. It is a popular everyday label rather than an official standard.

Its hue angle of 234° places it in the blue part of the color wheel, with 98% saturation (vivid) and 49% lightness (medium). It is a cool color.

Compared with the other blue colors in the Aqeeb Studio library, it is lighter than 53% of them and more saturated than 71% of them.

Its relative luminance is 0.076, 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.

Rich Blue counts as a dark color: its HSL lightness is 49% and its relative luminance is 0.076. White text reads comfortably on it (8.30:1 contrast).

Text contrast on Rich Blue

WCAG contrast of white and black text on Rich Blue
Text	Preview	Ratio	AA normal	AA large	AAA normal	AAA large
White text	Sample text	8.30:1 Excellent	Pass	Pass	Pass	Pass
Black text	Sample text	2.52:1 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 Rich 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.

≈ Dandelion#F9E002

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.

≈ Dark Sky Blue#0297F9 ≈ Strong Blue#6402F9

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.

≈ Bright Red#F9021B ≈ Electric Green#1BF902

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.

≈ Bright Orange#F96402 ≈ Bright Yellow Green#97F902

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.

≈ Hot Purple#E002F9 ≈ Dandelion#F9E002 ≈ Electric Green#1BF902

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.

#010C6B#010C6B

#0113B2#0113B2

#021BF9#021BF9

#4558FE#4558FE

#8C97FE#8C97FE

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 Rich 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.

Strong Blue#0C06F7 Vivid Blue#152EFF Pure Blue#0203E2 Light Royal Blue#3A2EFE Blue#0000FF Ultramarine Blue#1805DB Medium Blue#0000CD Vibrant Blue#0339F8

Where to use Rich Blue

Button, banner and badge backgrounds with white text (8.30:1 contrast)
Accents that need to stand out: call-to-action buttons, charts and illustrations
Headers and navigation bars
Charts and dashboards
Links, buttons and primary interface accents
Corporate, finance and software branding

Use Rich Blue in CSS

:root {
  --color-rich-blue: #021BF9;
}

.element {
  color: var(--color-rich-blue);
  background-color: #021BF9;
  border: 2px solid #021BF9;
}

Questions about Rich Blue

What is the HEX code for Rich Blue?

Rich Blue is #021BF9.

What is the RGB value of Rich Blue?

The RGB value of Rich Blue is 2, 27, 249: 2 red, 27 green and 249 blue on a 0–255 scale, written rgb(2, 27, 249) in CSS.

What is the HSL value of Rich Blue?

The HSL value of Rich Blue is 234°, 98%, 49% (hue, saturation, lightness), written hsl(234, 98%, 49%) in CSS.

What is the CMYK value of Rich Blue?

A standard conversion gives about C 99%, M 89%, Y 0%, K 2%. Real print results depend on the inks, paper and color profile, so treat CMYK here as a reference value.

Is Rich Blue a light or dark color?

Rich Blue counts as a dark color: its HSL lightness is 49% and its relative luminance is 0.076. White text reads comfortably on it (8.30:1 contrast).

How does Rich Blue look with white text?

White text on Rich Blue has a contrast ratio of 8.30:1, rated Excellent. It meets WCAG AA for normal text.

How does Rich Blue look with black text?

Black text on Rich Blue has a contrast ratio of 2.52:1, rated Poor. It falls below the WCAG minimum for text.

What colors go well with Rich Blue?

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

Where can Rich Blue be used?

It suits button, banner and badge backgrounds with white text (8.30:1 contrast); accents that need to stand out: call-to-action buttons, charts and illustrations; headers and navigation bars.

How do I use Rich Blue in CSS?

Use color: #021BF9; for text, background-color: #021BF9; for fills, or define a custom property such as --color-rich-blue: #021BF9; and reuse it with var(--color-rich-blue).

About this color page

Crowd-sourced name from the XKCD Color Survey (CC0). 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.

Rich Blue Color Code: #021BF9