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Charcoal vs Sky Blue: What's the Difference?

The main difference between Charcoal and Sky Blue is hue — Charcoal is a cool blue, while Sky Blue is a cool cyan. Charcoal (#36454F) has an HSL of 204°, 19%, 26%, whereas Sky Blue (#87CEEB) sits at 197°, 71%, 73%.

Charcoal#36454F
Sky Blue#87CEEB
#36454FBlended: #5F8A9D#87CEEB

Charcoal vs Sky Blue: Key Differences at a Glance

Aspect Charcoal Sky Blue
BrightnessDark (L=26%) — rich, serious, substantialLight (L=73%) — airy, soft, approachable
SaturationMuted (S=19%) — subdued, sophisticatedVivid (S=71%) — bright, energetic, eye-catching
Hue familyBlueCyan
TemperatureCoolCool
Hex code#36454F#87CEEB
RGB54, 69, 79135, 206, 235

Can you use Charcoal and Sky Blue together?

Sky Blue text on Charcoal
Charcoal text on Sky Blue
Contrast Ratio:5.69:1WCAG AA Pass ✓

How to Tell Charcoal and Sky Blue Apart

  • Look at lightness first: Sky Blue is noticeably lighter.
  • Check saturation: Sky Blue looks more vivid and saturated.
  • Compare them on a white background to see true saturation, and on black to see true lightness.

When to Use Charcoal vs Sky Blue in Design

Use Charcoal for:
Tech and corporate trust
Finance and banking brands
Links and primary buttons
Medical and professional UI
Calm dependable visuals
Use Sky Blue for:
Cool, techy, digital branding
Water, ice, cleaning products
Fresh modern UI accents
Summer and tropical themes
Youthful playful design

Charcoal and Sky Blue Hex Codes, RGB & HSL

Charcoal#36454F

Charcoal (#36454F) is a dark, muted blue with a cool undertone — it feels rich, serious, substantial and subdued, sophisticated.

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RGB
HSL
HSV
CMYK
PANTONE
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Sky Blue#87CEEB

Sky Blue (#87CEEB) is a light, vivid cyan with a cool undertone — it feels airy, soft, approachable and bright, energetic, eye-catching.

HEX
RGB
HSL
HSV
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PANTONE
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Charcoal and Sky Blue WCAG Contrast Ratios

Text legibility depends on the contrast ratio between foreground and background. WCAG 2.1 AA requires at least 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Use these numbers to choose accessible combinations for your design.

Sample text preview
Charcoal text on white
9.9:1AAA
Sample text preview
Charcoal text on black
2.12:1Fail
Sample text preview
Sky Blue text on white
1.74:1Fail
Sample text preview
Sky Blue text on black
12.06:1AAA
Sample text preview
Charcoal text on Sky Blue
5.69:1AA
Sample text preview
Sky Blue text on Charcoal
5.69:1AA

Explore Charcoal and Sky Blue individually

Each color has a dedicated page with shades, tints, CSS name, pairings, and color psychology.

Charcoal color page#36454F · shades, tints, pairingsSky Blue color page#87CEEB · shades, tints, pairings

More Charcoal and Sky Blue Comparisons

Charcoal vs Sky Blue FAQ

What is the difference between charcoal and sky blue?+
The main difference between Charcoal and Sky Blue is hue — Charcoal is a cool blue, while Sky Blue is a cool cyan. Charcoal (#36454F) has an HSL of 204°, 19%, 26%, whereas Sky Blue (#87CEEB) sits at 197°, 71%, 73%.
Is charcoal darker than sky blue?+
Yes. Charcoal is darker, with a lightness of 26% in HSL compared to Sky Blue at 73% — a 47-point gap.
Are charcoal and sky blue the same color?+
No. Charcoal is #36454F and Sky Blue is #87CEEB. They differ by 7° in hue, 47% in lightness, and 52% in saturation.
Which is more saturated, charcoal or sky blue?+
Sky Blue is more saturated. In HSL, Charcoal has 19% saturation and Sky Blue has 71% — Sky Blue is the more vivid of the two, while Charcoal reads as more muted.
Is charcoal warm or cool?+
Charcoal (#36454F) is a cool blue. Its hue sits at 204° on the color wheel, which places it in the cool range.
Is sky blue warm or cool?+
Sky Blue (#87CEEB) is a cool cyan. Its hue sits at 197° on the color wheel, which places it in the cool range.
Can you use charcoal and sky blue together?+
Yes. Charcoal (blue) and Sky Blue (cyan) can work as a complementary or analogous pair. Use one as the dominant tone and the other as a 10–20% accent to keep the palette balanced.
What color family does charcoal belong to?+
Charcoal belongs to the blue family. Its HSL is 204°, 19%, 26% — a cool tone within the broader blue group.
What is the hex code for charcoal?+
The hex code for Charcoal is #36454F. In RGB, that's rgb(54, 69, 79), and in HSL it's hsl(204, 19%, 26%).
What is the hex code for sky blue?+
The hex code for Sky Blue is #87CEEB. In RGB, that's rgb(135, 206, 235), and in HSL it's hsl(197, 71%, 73%).