Dark Midnight Blue

HEX: #003366 | Modern Palette

On White
12.61:1
PASS
On Black
1.67:1
FAIL

Color Specifications

HEX
#003366
RGB
0, 51, 102
HSL
210°, 100% ,40%
CMYK
100, 50, 0, 60

About Dark Midnight Blue

Dark Midnight Blue (#003366) is a color with RGB(0, 51, 102) and HSL(210°, 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 #663300, which creates strong contrast. Its triadic palette includes #660033 and #336600.

  • HEX: #003366
  • RGB: 0, 51, 102
  • HSL: 210°, 100%, 40%
  • Mood: Bold
  • Style: Vivid, Cool
  • Use case: Text, Button, Accent
  • Complementary color: #663300
  • Triadic colors: #660033, #336600

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 #003366 from deepest shade to lightest tint.

Color Characteristics

Mood
Bold
Style
Vivid Cool
Use case
Text Button Accent

Accessibility Simulation

Deuteranopia #2A2A66
Protanopia #303066
Tritanopia #003C3C
Achromatopsia #333333

Frequently Asked Questions

Dark Midnight Blue (#003366) is a color with RGB(0, 51, 102) and HSL(210°, 100%, 40%).

#003366 pairs strongly with #663300 as its complementary color. It can also be used with neutral tones for balanced UI and design layouts.

#003366 is suitable for Text, Button, Accent and works well with Vivid, Cool styles.

#003366 is commonly associated with Bold.

Similar Named Colors
Cool Black #002E63 ΔE 1.81
Prussian Blue #003153 ΔE 3.70
Dark Imperial Blue #00416A ΔE 5.68
Catalina Blue #062A78 ΔE 5.75

Code Snippets

/* Background */
.element {
    background-color: #003366;
}

/* Text */
.element {
    color: #003366;
}

/* Border */
.element {
    border: 1px solid #003366;
}

/* Linear gradient to complementary */
.element {
    background: linear-gradient(
        to right,
        #003366,
        #CC6600
    );
}

/* Radial gradient */
.element {
    background: radial-gradient(
        circle,
        #003366,
        #CC6600
    );
}

// SCSS variable
$dark-midnight-blue: #003366;

// With RGB channels (useful for rgba() usage)
$dark-midnight-blue-r: 0;
$dark-midnight-blue-g: 51;
$dark-midnight-blue-b: 102;

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