Deep Sky Blue

HEX: #00BFFF | Modern Palette

On White
2.12:1
FAIL
On Black
9.90:1
PASS

Color Specifications

HEX
#00BFFF
RGB
0, 191, 255
HSL
195°, 100% ,50%
CMYK
100, 25, 0, 0

About Deep Sky Blue

Deep Sky Blue (#00BFFF) is a color with RGB(0, 191, 255) and HSL(195.1°, 100%, 50%). 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 #FF4000, which creates strong contrast. Its triadic palette includes #FF00BF and Lime (#BFFF00). The name comes from Deep Sky Blue (English).

  • HEX: #00BFFF
  • RGB: 0, 191, 255
  • HSL: 195.1°, 100%, 50%
  • Mood: Bold
  • Style: Vivid, Cool
  • Use case: Text, Button, Accent
  • Complementary color: #FF4000
  • Triadic colors: #FF00BF, Lime (#BFFF00)
  • The name comes from Deep Sky Blue (English).

Live Components

LIGHT
DARK
System Notification Box

Color Palettes

Monochromatic Five tones of the same hue — a reliable scale for backgrounds, surfaces, and text.
Neutral + Accent Four near-neutral tones grounded by a saturated accent — clean and versatile for UI.
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

Complementary

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

Analogous

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

Triadic

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

Split-Complementary

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

Tetradic (Square)

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

Monochromatic

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

Shades & Tints

A seamless scale of #00BFFF from deepest shade to lightest tint.

Color Characteristics

Mood
Bold
Style
Vivid Cool
Use case
Text Button Accent

Accessibility Simulation

Deuteranopia #A4A4FF
Protanopia #B5B5FF
Tritanopia #00C9C9
Achromatopsia #B2B2B2

Frequently Asked Questions

Deep Sky Blue (#00BFFF) is a color with RGB(0, 191, 255) and HSL(195.1°, 100%, 50%).

#00BFFF pairs strongly with #FF4000 as its complementary color. It can also be used with neutral tones for balanced UI and design layouts.

#00BFFF is suitable for Text, Button, Accent and works well with Vivid, Cool styles.

#00BFFF is commonly associated with Bold.

The name Deep Sky Blue is linked to Deep Sky Blue from English, meaning A vivid, medium-light shade of azure blue, reminiscent of the color of the sky on a clear day, particularly when looking into the 'deep' expanse rather than towards the horizon..

Name, History & Etymology

Origin Word Deep Sky Blue
Meaning A vivid, medium-light shade of azure blue, reminiscent of the color of the sky on a clear day, particularly when looking into the 'deep' expanse rather than towards the horizon.
Language English
First Recorded Use Late 19th - Early 20th Century (as a named color)

History

The term 'sky blue' has been used for centuries to describe a color. As color science and naming became more precise, variations like 'light sky blue,' 'dark sky blue,' and 'deep sky blue' emerged to differentiate specific shades. 'Deep Sky Blue' gained significant recognition and standardization with its inclusion in the X11 color system, which is widely used in computing. This standardization helped solidify its specific hue and made it a commonly recognized color in digital and web design.

First Recorded Use

While the concept of 'sky blue' is ancient, the specific compound 'Deep Sky Blue' as a distinct color name with a defined hue likely emerged with the standardization of color names in art, fashion, and later, digital contexts. Its inclusion in early color systems and charts points to this period. For instance, it was defined as an X11 color in 1987.

Cultural Associations

As a shade of blue, Deep Sky Blue shares many of the cultural associations of blue in general: tranquility, serenity, openness, vastness, and reliability. Its specific vibrancy and depth often evoke feelings of clarity, optimism, and the boundless potential of a clear, open sky. It is frequently used in branding for technology, travel, and environmental initiatives due to these positive connotations. In fashion, it can be seen as a refreshing and versatile color.

Similar Named Colors
Spiro Disco Ball #0FC0FC ΔE 0.95
Cyan (process) #00B7EB ΔE 3.56
Picton Blue #45B1E8 ΔE 4.33
Vivid Sky Blue #00CCFF ΔE 5.04

Code Snippets

/* Background */
.element {
    background-color: #00BFFF;
}

/* Text */
.element {
    color: #00BFFF;
}

/* Border */
.element {
    border: 1px solid #00BFFF;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #00BFFF,
        #FF4000
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #00BFFF,
        #FF4000
    );
}

// SCSS variable
$deep-sky-blue: #00BFFF;

// With RGB channels (useful for rgba() usage)
$deep-sky-blue-r: 0;
$deep-sky-blue-g: 191;
$deep-sky-blue-b: 255;

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