What color is #173A63?

#173A63 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 #173A63?

The RGB value is 23, 58, 99: 23 red, 58 green and 99 blue on a 0 to 255 scale.

What is the complementary color of #173A63?

The complementary color is #634017, found by rotating the hue 180° on the color wheel.

Is black or white text better on #173A63?

White text. Black text has a contrast ratio of 1.82:1 and white text 11.53:1. WCAG asks for at least 4.5:1 for normal text.

#173A63 color

#173A63 rgb(23, 58, 99)

Shades of blue

The hex color #173A63 is a dark, moderate azure.

In the RGB color model it is made of 9% red, 22.7% green and 38.8% blue (23, 58, 99).

Its hue angle is 212°, with 62% saturation and 24% lightness. For print, the CMYK equivalent is 77% cyan, 41% magenta, 0% yellow and 61% black.

The closest named color is Lost in Space (#03386A), a difference of 1.8 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 11.53:1).

#173A63 color codes

HEX	`#173A63`
RGB	`rgb(23, 58, 99)`
RGB percent	`rgb(9%, 22.7%, 38.8%)`
HSL	`hsl(212, 62%, 24%)`
HSV / HSB	`hsv(212, 77%, 39%)`
CMYK	`cmyk(77%, 41%, 0%, 61%)`
CIE LAB	`lab(24.03, 3.07, -27.87)`
CIE LCH	`lch(24.03, 28.04, 276.3)`
CIE XYZ	`xyz(4.118, 4.109, 12.378)`
Decimal	`1522275`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #173A63, 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 #173A63	Ratio	AA	AAA	AA large
Sample text	1.82:1	Fail	Fail	Fail
Sample text	11.53:1	Pass	Pass	Pass

#173A63 as text on	Ratio	AA	AAA	AA large
Sample text	11.53:1	Pass	Pass	Pass
Sample text	1.82:1	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 #173A63 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #173a63; }
.text { color: #173a63; }
.border { border: 2px solid #173a63; }
.transparent { background-color: rgb(23 58 99 / 50%); }
.gradient { background: linear-gradient(to right, #173a63, #1a1763); }

Background

Text color

Border

Similar colors

Closest common color name: Prussian Blue.

Questions

What color is #173A63?: #173A63 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 #173A63?: The RGB value is 23, 58, 99: 23 red, 58 green and 99 blue on a 0 to 255 scale.
What is the complementary color of #173A63?: The complementary color is #634017, found by rotating the hue 180° on the color wheel.
Is black or white text better on #173A63?: White text. Black text has a contrast ratio of 1.82:1 and white text 11.53:1. WCAG asks for at least 4.5:1 for normal text.