What color is #283D5B?

#283D5B is a dark, desaturated azure, closest to the named color Nautilus. It belongs to the blue family of colors.

What is the RGB value of #283D5B?

The RGB value is 40, 61, 91: 40 red, 61 green and 91 blue on a 0 to 255 scale.

What is the complementary color of #283D5B?

The complementary color is #5B4628, found by rotating the hue 180° on the color wheel.

Is black or white text better on #283D5B?

White text. Black text has a contrast ratio of 1.91:1 and white text 11:1. WCAG asks for at least 4.5:1 for normal text.

#283D5B color

#283D5B rgb(40, 61, 91)

Shades of blue

The hex color #283D5B is a dark, desaturated azure.

In the RGB color model it is made of 15.7% red, 23.9% green and 35.7% blue (40, 61, 91).

Its hue angle is 215°, with 39% saturation and 26% lightness. For print, the CMYK equivalent is 56% cyan, 33% magenta, 0% yellow and 64% black.

The closest named color is Nautilus (#273C5A), a difference of 0.3 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 11:1).

#283D5B color codes

HEX	`#283D5B`
RGB	`rgb(40, 61, 91)`
RGB percent	`rgb(15.7%, 23.9%, 35.7%)`
HSL	`hsl(215, 39%, 26%)`
HSV / HSB	`hsv(215, 56%, 36%)`
CMYK	`cmyk(56%, 33%, 0%, 64%)`
CIE LAB	`lab(25.39, 1.54, -20.46)`
CIE LCH	`lch(25.39, 20.52, 274.31)`
CIE XYZ	`xyz(4.431, 4.544, 10.539)`
Decimal	`2637147`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #283D5B, 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 #283D5B	Ratio	AA	AAA	AA large
Sample text	1.91:1	Fail	Fail	Fail
Sample text	11:1	Pass	Pass	Pass

#283D5B as text on	Ratio	AA	AAA	AA large
Sample text	11:1	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 #283D5B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #283d5b; }
.text { color: #283d5b; }
.border { border: 2px solid #283d5b; }
.transparent { background-color: rgb(40 61 91 / 50%); }
.gradient { background: linear-gradient(to right, #283d5b, #2c285b); }

Background

Text color

Border

Similar colors

Closest common color name: Prussian Blue.

Questions

What color is #283D5B?: #283D5B is a dark, desaturated azure, closest to the named color Nautilus. It belongs to the blue family of colors.
What is the RGB value of #283D5B?: The RGB value is 40, 61, 91: 40 red, 61 green and 91 blue on a 0 to 255 scale.
What is the complementary color of #283D5B?: The complementary color is #5B4628, found by rotating the hue 180° on the color wheel.
Is black or white text better on #283D5B?: White text. Black text has a contrast ratio of 1.91:1 and white text 11:1. WCAG asks for at least 4.5:1 for normal text.