Name: Vivid Blue Cobalt (#378efa)
Brand: Colorful Dots, LLC
SKU: #378efa
Availability: InStock
Rating: 3.8 (132 reviews)

#378efa

Vivid Blue Cobalt

Brightness: 128

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Color Insights

27.1%

Luminance

Cool

Temperature

95%

Saturation

60%

Lightness

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Similar & Opposite Colors

Similar Colors

#37bffa

#377efa

Opposite Colors

#2765b2

#2788b2

#2742b2

#15365e

#1e4d88

#387ed3

Light & Dark Mode Suggestions

Light Mode Palette

#378efa

#69aafb

#9ac6fc

#cce2fe

#fefeff

Dark Mode Palette

#2765b2

#0672f8

#055bc6

#044494

#022d63

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Patterns

Color in Context

See how this color looks in common UI elements and design contexts.

Button

Card Header

Card Title

Card subtitle or description

Card content goes here...

Badge

New Feature

Progress Bar

Progress75%

Link

This is a link in your brand color

Links stand out while maintaining readability

Icon

Success

Action completed

💡 Accessibility Tip

When using this color for text or important UI elements, always check contrast ratios. Use the Contrast Checker section below to ensure your design meets accessibility standards.

Color Harmony Rules

Understanding color harmony helps create visually pleasing and effective designs. Each rule serves different purposes and emotional responses.

Monochromatic

Uses different shades, tints, and tones of the same hue. Creates a cohesive, calming effect.

Principle:Vary lightness and saturation while keeping the same hue

Best for:Backgrounds, subtle gradients, professional designs

#cce2fe

#82b8fc

#378efa

#0667df

#044494

Complementary

Colors opposite on the color wheel. Creates high contrast and vibrant designs.

Principle:180° apart on the color wheel - maximum contrast

Best for:Call-to-action buttons, highlighting important elements

#378efa

#faa337

Split Complementary

Base color plus two colors adjacent to its complement. Softer than complementary.

Principle:Base + 150° and 210° from base hue

Best for:Balanced designs with visual interest but less tension

#378efa

#fa4137

#effa37

Triadic

Three colors evenly spaced on the color wheel. Creates vibrant, balanced palettes.

Principle:120° apart - forms an equilateral triangle

Best for:Playful designs, children's content, creative projects

#378efa

#fa378e

#8efa37

Analogous

Colors next to each other on the color wheel. Creates serene, comfortable designs.

Principle:Adjacent hues (±30°) - naturally harmonious

Best for:Nature themes, calming interfaces, gradients

#37effa

#37bffa

#378efa

#375dfa

#4137fa

Tetradic (Rectangle)

Four colors forming a rectangle on the color wheel. Rich, diverse palette.

Principle:Two complementary pairs - offers most variety

Best for:Complex designs needing multiple accent colors

#378efa

#a337fa

#faa337

#8efa37

Professional Design Tips

60-30-10 Rule

Use 60% dominant color, 30% secondary, 10% accent for balanced designs

Contrast is Key

Ensure sufficient contrast between text and background colors

Context Matters

Colors appear different depending on surrounding colors

Less is More

Limit your palette to 2-4 colors for cohesive design

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Accessibility Deep Dive

Comprehensive accessibility analysis to ensure your color choices work for everyone, including users with visual impairments and color vision differences.

Contrast Ratio Analysis

3.28:1

vs White Background

6.41:1

vs Black Background

1.75:1

vs Gray Background

WCAG Level	Required Ratio	White BG	Black BG	Use Case
AA Normal Text	4.5:1	Fail	Pass	Minimum for body text, small UI elements
AA Large Text	3:1	Pass	Pass	18pt+ or 14pt+ bold text
AAA Normal Text	7:1	Fail	Fail	Enhanced accessibility standard
AAA Large Text	4.5:1	Fail	Pass	Enhanced for large text

Color Vision Simulation

See how your color appears to users with different types of color vision deficiency.

Normal Vision

Original Color

Protanopia

Red-blind (~1% of men)

Deuteranopia

Green-blind (~1% of men)

Tritanopia

Blue-blind (rare)

Accessibility Best Practices

Do:

• Test with actual users who have visual impairments
• Use tools like screen readers to test your design
• Provide multiple ways to convey information (not just color)
• Consider focus indicators for keyboard navigation

Avoid:

• Relying solely on color to convey meaning
• Using color combinations that are hard to distinguish
• Ignoring WCAG guidelines for critical UI elements
• Assuming all users see colors the same way

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