What color is #1F355B?

#1F355B 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 #1F355B?

The RGB value is 31, 53, 91: 31 red, 53 green and 91 blue on a 0 to 255 scale.

What is the complementary color of #1F355B?

The complementary color is #5B451F, found by rotating the hue 180° on the color wheel.

Is black or white text better on #1F355B?

White text. Black text has a contrast ratio of 1.72:1 and white text 12.22:1. WCAG asks for at least 4.5:1 for normal text.

#1F355B color

#1F355B rgb(31, 53, 91)

Shades of blue

The hex color #1F355B is a dark, desaturated azure.

In the RGB color model it is made of 12.2% red, 20.8% green and 35.7% blue (31, 53, 91).

Its hue angle is 218°, with 49% saturation and 24% lightness. For print, the CMYK equivalent is 66% cyan, 42% magenta, 0% yellow and 64% black.

The closest named color is Nautilus (#273C5A), a difference of 3.2 ΔE, a small difference.

White text is the more readable choice on this background (contrast 12.22:1).

#1F355B color codes

HEX	`#1F355B`
RGB	`rgb(31, 53, 91)`
RGB percent	`rgb(12.2%, 20.8%, 35.7%)`
HSL	`hsl(218, 49%, 24%)`
HSV / HSB	`hsv(218, 66%, 36%)`
CMYK	`cmyk(66%, 42%, 0%, 64%)`
CIE LAB	`lab(22.28, 4.87, -25.41)`
CIE LCH	`lch(22.28, 25.87, 280.85)`
CIE XYZ	`xyz(3.726, 3.593, 10.393)`
Decimal	`2045275`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #1F355B, 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 #1F355B	Ratio	AA	AAA	AA large
Sample text	1.72:1	Fail	Fail	Fail
Sample text	12.22:1	Pass	Pass	Pass

#1F355B as text on	Ratio	AA	AAA	AA large
Sample text	12.22:1	Pass	Pass	Pass
Sample text	1.72:1	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 #1F355B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #1f355b; }
.text { color: #1f355b; }
.border { border: 2px solid #1f355b; }
.transparent { background-color: rgb(31 53 91 / 50%); }
.gradient { background: linear-gradient(to right, #1f355b, #271f5b); }

Background

Text color

Border

Similar colors

Closest common color name: Prussian Blue.

Questions

What color is #1F355B?: #1F355B 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 #1F355B?: The RGB value is 31, 53, 91: 31 red, 53 green and 91 blue on a 0 to 255 scale.
What is the complementary color of #1F355B?: The complementary color is #5B451F, found by rotating the hue 180° on the color wheel.
Is black or white text better on #1F355B?: White text. Black text has a contrast ratio of 1.72:1 and white text 12.22:1. WCAG asks for at least 4.5:1 for normal text.