What color is #3366DD?

#3366DD is a moderate blue, closest to the named color Royal Blue. It belongs to the blue family of colors.

What is the RGB value of #3366DD?

The RGB value is 51, 102, 221: 51 red, 102 green and 221 blue on a 0 to 255 scale.

What is the complementary color of #3366DD?

The complementary color is #DDAA33, found by rotating the hue 180° on the color wheel.

Is black or white text better on #3366DD?

White text. Black text has a contrast ratio of 4.09:1 and white text 5.14:1. WCAG asks for at least 4.5:1 for normal text.

#3366DD color

#3366DD rgb(51, 102, 221)

Shades of blue

The hex color #3366DD is a moderate blue.

In the RGB color model it is made of 20% red, 40% green and 86.7% blue (51, 102, 221).

Its hue angle is 222°, with 71% saturation and 53% lightness. For print, the CMYK equivalent is 77% cyan, 54% magenta, 0% yellow and 13% black.

The closest named color is Royal Blue (#4169E1), a difference of 1.8 ΔE, which is barely visible.

White text is the more readable choice on this background (contrast 5.14:1).

#3366DD color codes

HEX	`#3366DD`
RGB	`rgb(51, 102, 221)`
RGB percent	`rgb(20%, 40%, 86.7%)`
HSL	`hsl(222, 71%, 53%)`
HSV / HSB	`hsv(222, 77%, 87%)`
CMYK	`cmyk(77%, 54%, 0%, 13%)`
CIE LAB	`lab(46.21, 25.04, -65.65)`
CIE LCH	`lch(46.21, 70.26, 290.88)`
CIE XYZ	`xyz(19.163, 15.425, 70.36)`
Decimal	`3368669`
Short hex	`#36D`

Color harmonies

Colors that go with #3366DD, 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 #3366DD	Ratio	AA	AAA	AA large
Sample text	4.09:1	Fail	Fail	Pass
Sample text	5.14:1	Pass	Fail	Pass

#3366DD as text on	Ratio	AA	AAA	AA large
Sample text	5.14:1	Pass	Fail	Pass
Sample text	4.09:1	Fail	Fail	Pass

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 #3366DD looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #3366dd; }
.text { color: #3366dd; }
.border { border: 2px solid #3366dd; }
.transparent { background-color: rgb(51 102 221 / 50%); }
.gradient { background: linear-gradient(to right, #3366dd, #5533dd); }

Background

Text color

Border

Similar colors

Questions

What color is #3366DD?: #3366DD is a moderate blue, closest to the named color Royal Blue. It belongs to the blue family of colors.
What is the RGB value of #3366DD?: The RGB value is 51, 102, 221: 51 red, 102 green and 221 blue on a 0 to 255 scale.
What is the complementary color of #3366DD?: The complementary color is #DDAA33, found by rotating the hue 180° on the color wheel.
Is black or white text better on #3366DD?: White text. Black text has a contrast ratio of 4.09:1 and white text 5.14:1. WCAG asks for at least 4.5:1 for normal text.