What color is #183B73?

#183B73 is a dark, moderate azure, closest to the named color Lost in Space. It belongs to the blue family of colors.

What is the RGB value of #183B73?

The RGB value is 24, 59, 115: 24 red, 59 green and 115 blue on a 0 to 255 scale.

What is the complementary color of #183B73?

The complementary color is #735018, found by rotating the hue 180° on the color wheel.

Is black or white text better on #183B73?

White text. Black text has a contrast ratio of 1.91:1 and white text 10.98:1. WCAG asks for at least 4.5:1 for normal text.

#183B73 color

#183B73 rgb(24, 59, 115)

Shades of blue

The hex color #183B73 is a dark, moderate azure.

In the RGB color model it is made of 9.4% red, 23.1% green and 45.1% blue (24, 59, 115).

Its hue angle is 217°, with 65% saturation and 27% lightness. For print, the CMYK equivalent is 79% cyan, 49% magenta, 0% yellow and 55% black.

The closest named color is Lost in Space (#03386A), a difference of 2.5 ΔE, a small difference.

White text is the more readable choice on this background (contrast 10.98:1).

#183B73 color codes

HEX	`#183B73`
RGB	`rgb(24, 59, 115)`
RGB percent	`rgb(9.4%, 23.1%, 45.1%)`
HSL	`hsl(217, 65%, 27%)`
HSV / HSB	`hsv(217, 79%, 45%)`
CMYK	`cmyk(79%, 49%, 0%, 55%)`
CIE LAB	`lab(25.44, 9.15, -35.89)`
CIE LCH	`lch(25.44, 37.03, 284.3)`
CIE XYZ	`xyz(5.034, 4.559, 16.831)`
Decimal	`1588083`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #183B73, based on their position on the color wheel.

Complementary

The color opposite on the color wheel (180°). Strongest contrast.

Analogous

Neighbors 30° either side. Calm, natural combinations.

Split complementary

The two colors next to the complement (150° and 210°).

Triadic

Three colors evenly spaced, 120° apart.

Tetradic (square)

Four colors 90° apart.

Shades, tints and tones

Shades (darker, mixed with black)

Tints (lighter, mixed with white)

Tones (mixed with gray)

Contrast and accessibility

Text on #183B73	Ratio	AA	AAA	AA large
Sample text	1.91:1	Fail	Fail	Fail
Sample text	10.98:1	Pass	Pass	Pass

#183B73 as text on	Ratio	AA	AAA	AA large
Sample text	10.98:1	Pass	Pass	Pass
Sample text	1.91:1	Fail	Fail	Fail

WCAG 2 asks for 4.5:1 for normal text (AA), 7:1 for AAA, and 3:1 for large text. Check other pairs.

Color blindness simulation

How #183B73 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #183b73; }
.text { color: #183b73; }
.border { border: 2px solid #183b73; }
.transparent { background-color: rgb(24 59 115 / 50%); }
.gradient { background: linear-gradient(to right, #183b73, #221873); }

Background

Text color

Border

Similar colors

Closest common color name: Prussian Blue.

Questions

What color is #183B73?: #183B73 is a dark, moderate azure, closest to the named color Lost in Space. It belongs to the blue family of colors.
What is the RGB value of #183B73?: The RGB value is 24, 59, 115: 24 red, 59 green and 115 blue on a 0 to 255 scale.
What is the complementary color of #183B73?: The complementary color is #735018, found by rotating the hue 180° on the color wheel.
Is black or white text better on #183B73?: White text. Black text has a contrast ratio of 1.91:1 and white text 10.98:1. WCAG asks for at least 4.5:1 for normal text.