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Blue vs Cobalt

What's the difference? Side-by-side comparison with color codes, shades, and usage guide.

Blue#0000FF
Cobalt#0047AB
#0000FFBlended: #0024D5#0047AB
Quick Answer

Blue and Cobalt are often confused but have distinct differences in hue, saturation, and tone. Blue (#0000FF) and Cobalt (#0047AB) each suit different design contexts — understanding their differences helps you choose the right color for your project.

Key Differences

Aspect Blue Cobalt
BrightnessDark — feels deep, rich, groundedLight — feels airy, bright, lively
SaturationMuted — more subdued, restrainedVivid — more colorful, eye-catching
WarmthCooler — leans more toward blueWarmer — leans slightly toward green
MoodSophisticated, calm, professionalPlayful, energetic, tropical
Best forCorporate branding, interiors, formal designSummer themes, jewelry, casual/fun design
CSS nameteal (built-in)turquoise (built-in)

Can you use them together?

Cobalt text on Blue
Blue text on Cobalt
Contrast Ratio:1.02:1Insufficient Contrast

When to use each

Use Blue for:
●Corporate websites and branding
●Elegant interior design
●Professional presentations
●Dark-mode friendly UI elements
●Formal event invitations
Use Cobalt for:
●Summer and tropical themes
●Children's products and toys
●Beach and travel branding
●Jewelry and gemstone marketing
●Bright, energetic social media posts

Full Color Details

Blue#0000FF

Teal is a deep blue-green color named after the Eurasian teal bird. It's widely used in web design, fashion, and interior decor for its calming, sophisticated quality.

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Cobalt#0047AB

Turquoise is a brighter, more vibrant blue-green named after the gemstone. It's lighter and more energetic than teal, evoking tropical waters, summer, and playfulness.

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FAQ

What is the difference between blue and cobalt?+
Blue and Cobalt are often confused but have distinct differences in hue, saturation, and tone. Blue (#0000FF) and Cobalt (#0047AB) each suit different design contexts — understanding their differences helps you choose the right color for your project.
Is blue darker than cobalt?+
Yes. Blue (#0000FF) is significantly darker than Cobalt (#0047AB). Blue has a lightness of 50% in HSL, while Cobalt has 34% lightness.
Can you use blue and cobalt together?+
Yes, they can work well together in a monochromatic or analogous palette since they're both blue-green colors. Their contrast ratio is 1.02:1. Use blue as the dominant/darker color and cobalt as the accent or highlight.
What is the hex code for blue?+
The hex code for Blue is #0000FF. In RGB, that's rgb(0, 0, 255).
What is the hex code for cobalt?+
The hex code for Cobalt is #0047AB. In RGB, that's rgb(0, 71, 171).