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Slate Blue vs Indigo

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

Slate Blue#6A5ACD
Indigo#4B0082
#6A5ACDBlended: #5B2DA8#4B0082
Quick Answer

Slate Blue and Indigo are often confused but have distinct differences in hue, saturation, and tone. Slate Blue (#6A5ACD) and Indigo (#4B0082) each suit different design contexts — understanding their differences helps you choose the right color for your project.

Key Differences

Aspect Slate Blue Indigo
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?

Indigo text on Slate Blue
Slate Blue text on Indigo
Contrast Ratio:2.44:1Insufficient Contrast

When to use each

Use Slate Blue for:
●Corporate websites and branding
●Elegant interior design
●Professional presentations
●Dark-mode friendly UI elements
●Formal event invitations
Use Indigo 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

Slate Blue#6A5ACD

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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Indigo#4B0082

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 slate blue and indigo?+
Slate Blue and Indigo are often confused but have distinct differences in hue, saturation, and tone. Slate Blue (#6A5ACD) and Indigo (#4B0082) each suit different design contexts — understanding their differences helps you choose the right color for your project.
Is slate blue darker than indigo?+
Yes. Slate Blue (#6A5ACD) is significantly darker than Indigo (#4B0082). Slate Blue has a lightness of 58% in HSL, while Indigo has 25% lightness.
Can you use slate blue and indigo together?+
Yes, they can work well together in a monochromatic or analogous palette since they're both blue-green colors. Their contrast ratio is 2.44:1. Use slate blue as the dominant/darker color and indigo as the accent or highlight.
What is the hex code for slate blue?+
The hex code for Slate Blue is #6A5ACD. In RGB, that's rgb(106, 90, 205).
What is the hex code for indigo?+
The hex code for Indigo is #4B0082. In RGB, that's rgb(75, 0, 130).