Medium Slate Blue vs Indigo — Difference, Contrast & Harmony

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Medium Slate Bluenearest vs Indigonearest

#6366F1 · #9C4FD8

Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 97/100 (analogous) · Distinguishable 60/100 (somewhat similar) · Match 53/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.

Readability1Fail

The quick brown fox jumps over the lazy dog.

Fail1.0:1

Harmony97Analogous

Analogous

35° apart

Distinguishable60Somewhat similar

normal

colorblind

ΔE 21

Match53Different

ΔE 21 — different

How different are Medium Slate Blue and Indigo?

Medium Slate Blue and Indigo are a clear pair (ΔE 21). They have distinctly different hues (35° apart) and their lightness is similar, so they read as two same-weight colours.

Can you read one on the other?

Medium Slate Blue text on Indigo: 1.04:1 (Fail); Indigo text on Medium Slate Blue: 1.04:1 (Fail). Neither meets AA at body size — nudging one color to #FBFCFF clears it.

Common questions

Do Medium Slate Blue and Indigo go well together?

Analogous — analogous — a recognised, balanced pairing (harmony 97/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.

Is Medium Slate Blue readable as text on Indigo?

Not at body size — the best direction is only 1.0:1, below the 4.5:1 minimum. Nudging one colour to #FBFCFF clears AA.

What is the colour difference (ΔE) between Medium Slate Blue and Indigo?

Their CIE76 ΔE is about 21 — a clear pair.

Are Medium Slate Blue and Indigo the same colour?

clearly different colours (ΔE 21).

Related comparisons

Explore each color: Medium Slate Blue #6366F1 · Indigo #9C4FD8 · Shades: Medium Slate Blue shades · Indigo shades · Contrast checker →

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