What color is #003666?

#003666 is a dark, vivid azure, closest to the named color Lost in Space. It belongs to the blue family of colors.

What is the RGB value of #003666?

The RGB value is 0, 54, 102: 0 red, 54 green and 102 blue on a 0 to 255 scale.

What is the complementary color of #003666?

The complementary color is #663000, found by rotating the hue 180° on the color wheel.

Is black or white text better on #003666?

White text. Black text has a contrast ratio of 1.72:1 and white text 12.21:1. WCAG asks for at least 4.5:1 for normal text.

#003666 color

#003666 rgb(0, 54, 102)

Shades of blue

The hex color #003666 is a dark, vivid azure.

In the RGB color model it is made of 0% red, 21.2% green and 40% blue (0, 54, 102).

Its hue angle is 208°, with 100% saturation and 20% lightness. For print, the CMYK equivalent is 100% cyan, 47% magenta, 0% yellow and 60% black.

The closest named color is Lost in Space (#03386A), a difference of 0.8 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 12.21:1).

#003666 color codes

HEX	`#003666`
RGB	`rgb(0, 54, 102)`
RGB percent	`rgb(0%, 21.2%, 40%)`
HSL	`hsl(208, 100%, 20%)`
HSV / HSB	`hsv(208, 100%, 40%)`
CMYK	`cmyk(100%, 47%, 0%, 60%)`
CIE LAB	`lab(22.29, 4.66, -32.63)`
CIE LCH	`lch(22.29, 32.96, 278.12)`
CIE XYZ	`xyz(3.717, 3.597, 13.066)`
Decimal	`13926`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #003666, 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 #003666	Ratio	AA	AAA	AA large
Sample text	1.72:1	Fail	Fail	Fail
Sample text	12.21:1	Pass	Pass	Pass

#003666 as text on	Ratio	AA	AAA	AA large
Sample text	12.21:1	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 #003666 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #003666; }
.text { color: #003666; }
.border { border: 2px solid #003666; }
.transparent { background-color: rgb(0 54 102 / 50%); }
.gradient { background: linear-gradient(to right, #003666, #000366); }

Background

Text color

Border

Similar colors

Questions

What color is #003666?: #003666 is a dark, vivid azure, closest to the named color Lost in Space. It belongs to the blue family of colors.
What is the RGB value of #003666?: The RGB value is 0, 54, 102: 0 red, 54 green and 102 blue on a 0 to 255 scale.
What is the complementary color of #003666?: The complementary color is #663000, found by rotating the hue 180° on the color wheel.
Is black or white text better on #003666?: White text. Black text has a contrast ratio of 1.72:1 and white text 12.21:1. WCAG asks for at least 4.5:1 for normal text.