Royal Blue

HEX: #002366 | Modern Palette

On White
14.66:1
PASS
On Black
1.43:1
FAIL

Color Specifications

HEX
#002366
RGB
0, 35, 102
HSL
219°, 100% ,40%
CMYK
100, 65.69, 0, 60

About Royal Blue

Royal Blue (#002366) is a color with RGB(0, 35, 102) and HSL(219.41°, 100%, 40%). It is commonly associated with Bold moods. In design, it fits Vivid, Cool styles and is suitable for Text, Button, Accent. Its complementary color is #664300, which creates strong contrast. Its triadic palette includes #660023 and #236600. The name comes from Royal Blue (English).

  • HEX: #002366
  • RGB: 0, 35, 102
  • HSL: 219.41°, 100%, 40%
  • Mood: Bold
  • Style: Vivid, Cool
  • Use case: Text, Button, Accent
  • Complementary color: #664300
  • Triadic colors: #660023, #236600
  • The name comes from Royal Blue (English).

Live Components

LIGHT
DARK
System Notification Box

Color Palettes

Royal Blue #002366 is used in Monochromatic, Neutral + Accent, Analogous, 3 + 1 + 1 palettes, giving designers ready-made combinations for backgrounds, surfaces, accents, and interface elements.

Monochromatic Five tones of the same hue — a reliable scale for backgrounds, surfaces, and text.
ROYAL BLUE
 
 
 
 
Neutral + Accent Four near-neutral tones grounded by a saturated accent — clean and versatile for UI.
 
 
ROYAL BLUE
 
 
Analogous Five hues drifting across a 60° arc — naturally harmonious and pleasing to the eye.
 
 
 
 
 
3 + 1 + 1 Three analogous base colors, one complementary accent, one dark anchor — bold yet balanced.
 
 
 
 
 

Color Harmonies

Royal Blue #002366 pairs with #664300 as its complementary color, and #660023 and #236600 in triadic combinations. These harmony relationships help create balanced color combinations for UI, branding, and design work.

Complementary

The color directly opposite on the color wheel — creates maximum contrast and vibrance.

ROYAL BLUE
Analogous

Colors adjacent on the wheel — naturally harmonious and pleasing to the eye.

ROYAL BLUE
Triadic

Three colors equally spaced 120° apart — bold, balanced, and visually rich.

ROYAL BLUE
Split-Complementary

Two colors flanking the complement — high contrast with less tension than full complementary.

ROYAL BLUE
Tetradic (Square)

Four colors at 90° intervals — rich variety, best when one color dominates.

ROYAL BLUE
Monochromatic

Shades and tints of the same hue — cohesive, elegant, and easy to work with.

ROYAL BLUE

Shades & Tints

The shade and tint range for Royal Blue #002366 moves from dark #00091A tones through the base color to lighter #E6EEFF tones, making it useful for depth, hierarchy, and background variation.

ROYAL BLUE

Color Characteristics

Mood
Bold
Style
Vivid Cool
Use case
Text Button Accent

Accessibility Simulation

Deuteranopia #1C1C66
Protanopia #212166
Tritanopia #003232
Achromatopsia #282828

Frequently Asked Questions

Royal Blue (#002366) is a color with RGB(0, 35, 102) and HSL(219.41°, 100%, 40%).

#002366 pairs strongly with #664300 as its complementary color. It can also be used with neutral tones for balanced UI and design layouts.

#002366 is suitable for Text, Button, Accent and works well with Vivid, Cool styles.

#002366 is commonly associated with Bold.

The name Royal Blue is linked to Royal Blue from English, meaning A deep, vivid shade of blue, often associated with royalty..

Name, History & Etymology

Origin Word Royal Blue
Meaning A deep, vivid shade of blue, often associated with royalty.
Language English
First Recorded Use 18th Century

History

While the specific origin story points to Queen Charlotte, the association of blue with royalty and nobility predates this significantly. Blue pigments were often expensive and difficult to produce, making them a luxury. Lapis lazuli, for example, was used to create ultramarine, a highly prized blue. The 'royal' designation solidified a particular shade of blue as being fit for monarchs. Over time, the exact shade referred to as 'Royal Blue' has varied slightly, but it generally remains a strong, dark blue.

First Recorded Use

The term 'Royal Blue' is said to have originated in the UK in the late 18th century, specifically for a competition among cloth makers to make a dress for Queen Charlotte (wife of King George III). The winning color was then named 'Royal Blue'.

Cultural Associations

Royal Blue is widely recognized as a color of sophistication, authority, and stability. It is often used in corporate branding, uniforms (especially for police and military in some countries), and formal wear. It can evoke feelings of trust and reliability. In some cultures, blue is also associated with divinity or protection. It is a popular color in heraldry and national flags.

Similar Named Colors
Catalina Blue #062A78 ΔE 3.14
Cool Black #002E63 ΔE 4.58
Saint Patrick Blue #23297A ΔE 4.71
Midnight Blue #191970 ΔE 5.55

Code Snippets

/* Background */
.element {
    background-color: #002366;
}

/* Text */
.element {
    color: #002366;
}

/* Border */
.element {
    border: 1px solid #002366;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #002366,
        #CC8600
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #002366,
        #CC8600
    );
}

// SCSS variable
$royal-blue: #002366;

// With RGB channels (useful for rgba() usage)
$royal-blue-r: 0;
$royal-blue-g: 35;
$royal-blue-b: 102;

// Usage
.element {
    background-color: $royal-blue;
    color: rgba($royal-blue-r, $royal-blue-g, $royal-blue-b, 0.8);
}