What color is #183A6B?

#183A6B 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 #183A6B?

The RGB value is 24, 58, 107: 24 red, 58 green and 107 blue on a 0 to 255 scale.

What is the complementary color of #183A6B?

The complementary color is #6B4918, found by rotating the hue 180° on the color wheel.

Is black or white text better on #183A6B?

White text. Black text has a contrast ratio of 1.86:1 and white text 11.31:1. WCAG asks for at least 4.5:1 for normal text.

#183A6B color

#183A6B rgb(24, 58, 107)

Shades of blue

The hex color #183A6B is a dark, moderate azure.

In the RGB color model it is made of 9.4% red, 22.7% green and 42% blue (24, 58, 107).

Its hue angle is 215°, with 63% saturation and 26% lightness. For print, the CMYK equivalent is 78% cyan, 46% magenta, 0% yellow and 58% black.

The closest named color is Lost in Space (#03386A), a difference of 1.9 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 11.31:1).

#183A6B color codes

HEX	`#183A6B`
RGB	`rgb(24, 58, 107)`
RGB percent	`rgb(9.4%, 22.7%, 42%)`
HSL	`hsl(215, 63%, 26%)`
HSV / HSB	`hsv(215, 78%, 42%)`
CMYK	`cmyk(78%, 46%, 0%, 58%)`
CIE LAB	`lab(24.58, 6.53, -32.15)`
CIE LCH	`lch(24.58, 32.81, 281.49)`
CIE XYZ	`xyz(4.543, 4.281, 14.494)`
Decimal	`1587819`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #183A6B, 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 #183A6B	Ratio	AA	AAA	AA large
Sample text	1.86:1	Fail	Fail	Fail
Sample text	11.31:1	Pass	Pass	Pass

#183A6B as text on	Ratio	AA	AAA	AA large
Sample text	11.31:1	Pass	Pass	Pass
Sample text	1.86:1	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 #183A6B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #183a6b; }
.text { color: #183a6b; }
.border { border: 2px solid #183a6b; }
.transparent { background-color: rgb(24 58 107 / 50%); }
.gradient { background: linear-gradient(to right, #183a6b, #1f186b); }

Background

Text color

Border

Similar colors

Closest common color name: Prussian Blue.

Questions

What color is #183A6B?: #183A6B 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 #183A6B?: The RGB value is 24, 58, 107: 24 red, 58 green and 107 blue on a 0 to 255 scale.
What is the complementary color of #183A6B?: The complementary color is #6B4918, found by rotating the hue 180° on the color wheel.
Is black or white text better on #183A6B?: White text. Black text has a contrast ratio of 1.86:1 and white text 11.31:1. WCAG asks for at least 4.5:1 for normal text.