What color is #00307B?

#00307B is a dark, vivid azure, closest to the named color Below the Surface. It belongs to the blue family of colors.

What is the RGB value of #00307B?

The RGB value is 0, 48, 123: 0 red, 48 green and 123 blue on a 0 to 255 scale.

What is the complementary color of #00307B?

The complementary color is #7B4B00, found by rotating the hue 180° on the color wheel.

Is black or white text better on #00307B?

White text. Black text has a contrast ratio of 1.71:1 and white text 12.29:1. WCAG asks for at least 4.5:1 for normal text.

#00307B color

#00307B rgb(0, 48, 123)

Shades of blue

The hex color #00307B is a dark, vivid azure.

In the RGB color model it is made of 0% red, 18.8% green and 48.2% blue (0, 48, 123).

Its hue angle is 217°, with 100% saturation and 24% lightness. For print, the CMYK equivalent is 100% cyan, 61% magenta, 0% yellow and 52% black.

The closest named color is Below the Surface (#0A2F7C), a difference of 0.9 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 12.29:1).

#00307B color codes

HEX	`#00307B`
RGB	`rgb(0, 48, 123)`
RGB percent	`rgb(0%, 18.8%, 48.2%)`
HSL	`hsl(217, 100%, 24%)`
HSV / HSB	`hsv(217, 100%, 48%)`
CMYK	`cmyk(100%, 61%, 0%, 52%)`
CIE LAB	`lab(22.1, 18.39, -46.41)`
CIE LCH	`lch(22.1, 49.93, 291.62)`
CIE XYZ	`xyz(4.631, 3.543, 19.175)`
Decimal	`12411`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with #00307B, 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 #00307B	Ratio	AA	AAA	AA large
Sample text	1.71:1	Fail	Fail	Fail
Sample text	12.29:1	Pass	Pass	Pass

#00307B as text on	Ratio	AA	AAA	AA large
Sample text	12.29:1	Pass	Pass	Pass
Sample text	1.71:1	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 #00307B looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #00307b; }
.text { color: #00307b; }
.border { border: 2px solid #00307b; }
.transparent { background-color: rgb(0 48 123 / 50%); }
.gradient { background: linear-gradient(to right, #00307b, #0e007b); }

Background

Text color

Border

Similar colors

Closest common color name: Egyptian Blue.

Questions

What color is #00307B?: #00307B is a dark, vivid azure, closest to the named color Below the Surface. It belongs to the blue family of colors.
What is the RGB value of #00307B?: The RGB value is 0, 48, 123: 0 red, 48 green and 123 blue on a 0 to 255 scale.
What is the complementary color of #00307B?: The complementary color is #7B4B00, found by rotating the hue 180° on the color wheel.
Is black or white text better on #00307B?: White text. Black text has a contrast ratio of 1.71:1 and white text 12.29:1. WCAG asks for at least 4.5:1 for normal text.