Twilight Blue Color Code: #0A437A, RGB & HSL

Twilight Blue color values

HEX #0A437A

RGB rgb(10, 67, 122)

HSL hsl(209, 85%, 26%)

HSV 209, 92%, 48%

HWB hwb(209 4% 52%)

CMYK 92%, 45%, 0%, 52%

Decimal 672634

26%HSL lightness (dark)

85%HSL saturation (vivid)

209°Hue angle (azure)

0.055Relative luminance

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

What is Twilight Blue?

“Twilight 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 209° places it in the azure part of the color wheel, with 85% saturation (vivid) and 26% lightness (dark). It is a cool color.

Compared with the other blue colors in the Aqeeb Studio library, it is lighter than 11% of them and more saturated than 45% of them.

Its relative luminance is 0.055, 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.

Twilight Blue counts as a dark color: its HSL lightness is 26% and its relative luminance is 0.055. White text reads comfortably on it (10.01:1 contrast).

Text contrast on Twilight Blue

WCAG contrast of white and black text on Twilight Blue
Text	Preview	Ratio	AA normal	AA large	AAA normal	AAA large
White text	Sample text	10.01:1 Excellent	Pass	Pass	Pass	Pass
Black text	Sample text	2.09:1 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 Twilight 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.

≈ Saddle Brown#7A410A

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.

≈ Teal#0A7A79 ≈ Deep Blue#0A0B7A

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.

≈ Red Purple#7A0A43 ≈ Dark Grass Green#437A0A

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.

≈ Blood#7A0A0B ≈ Olive#7A790A

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.

≈ Indigo#410A7A ≈ Saddle Brown#7A410A ≈ Dark Grass Green#437A0A

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.

#02101C#02101C

#08345E#08345E

#0D58A0#0D58A0

#137CE2#137CE2

#4CA0F0#4CA0F0

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 Twilight 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.

Prussian Blue#004577 Marine Blue#01386A Light Navy#155084 Dusk Blue#26538D Marine#042E60 Denim Blue#3B5B92 Cobalt#1E488F Deep Sea Blue#015482

Where to use Twilight Blue

Button, banner and badge backgrounds with white text (10.01:1 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 Twilight Blue in CSS

:root {
  --color-twilight-blue: #0A437A;
}

.element {
  color: var(--color-twilight-blue);
  background-color: #0A437A;
  border: 2px solid #0A437A;
}

Questions about Twilight Blue

What is the HEX code for Twilight Blue?

Twilight Blue is #0A437A.

What is the RGB value of Twilight Blue?

The RGB value of Twilight Blue is 10, 67, 122: 10 red, 67 green and 122 blue on a 0–255 scale, written rgb(10, 67, 122) in CSS.

What is the HSL value of Twilight Blue?

The HSL value of Twilight Blue is 209°, 85%, 26% (hue, saturation, lightness), written hsl(209, 85%, 26%) in CSS.

What is the CMYK value of Twilight Blue?

A standard conversion gives about C 92%, M 45%, Y 0%, K 52%. Real print results depend on the inks, paper and color profile, so treat CMYK here as a reference value.

Is Twilight Blue a light or dark color?

Twilight Blue counts as a dark color: its HSL lightness is 26% and its relative luminance is 0.055. White text reads comfortably on it (10.01:1 contrast).

How does Twilight Blue look with white text?

White text on Twilight Blue has a contrast ratio of 10.01:1, rated Excellent. It meets WCAG AA for normal text.

How does Twilight Blue look with black text?

Black text on Twilight Blue has a contrast ratio of 2.09:1, rated Poor. It falls below the WCAG minimum for text.

What colors go well with Twilight Blue?

Saddle Brown is its complementary color, and Teal sits beside it as an analogous color. Lighter and darker variants of the same hue also work well for monochromatic palettes.

Where can Twilight Blue be used?

It suits button, banner and badge backgrounds with white text (10.01:1 contrast); accents that need to stand out: call-to-action buttons, charts and illustrations; charts and dashboards.

How do I use Twilight Blue in CSS?

Use color: #0A437A; for text, background-color: #0A437A; for fills, or define a custom property such as --color-twilight-blue: #0A437A; and reuse it with var(--color-twilight-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.

Twilight Blue Color Code: #0A437A