Deep Indigo
Also known as: Alpha Centauri, Nyctophobia Blue, Blue Review, Dark Iris
Quietly cool and professional, Deep Indigo is a cool-toned blue that earns its keep in corporate branding and SaaS products. Set it against a brown accent when you want the combination to pop. It's dark enough to use for text on white backgrounds (7.19:1, passes WCAG AA).
Deep Indigo color codes
- HEX
- #4C567A
- RGB
- rgb(76, 86, 122)
- RGBA
- rgba(76, 86, 122, 1)
- HSL
- hsl(227, 23%, 39%)
- HSV
- hsv(227, 38%, 48%)
- CMYK
- cmyk(38%, 30%, 0%, 52%)
- LAB
- lab(36.9 3.3 -21.9)
- OKLCH
- oklch(46.0% 0.060 271.9)
Color intelligence
Displays accurately on every screen and translates well to print.
Temperature
cool
Nearest standard colors
- CSS: darkslateblue#483D8B · ΔE 10.5
- RAL 5000 — Violet blue#384C70 · ΔE 5.1 · approximate
RAL values are widely published approximations of the physical standard. For Pantone-adjacent workflows, match by eye against a physical fan deck — Pantone's values are proprietary and device-dependent, so we don't print lookups.
Where Deep Indigo works
- Web & UI: Dark enough for body text and icons on white backgrounds — it passes WCAG AA as-is.
- Interiors: Strong for a whole room, excellent in doses: an accent wall, cabinetry, or a statement chair.
- Fashion: A wardrobe neutral: it anchors outfits and pairs with nearly any accent color.
- Branding: Sits in the trust register — a natural primary for finance, health, and B2B brands.
- Web & UI: A supporting-cast color for UI: chart fills, tags, empty-state illustrations — not text.
- Fashion: Wears best as the statement piece — a top, scarf, or shoes — against neutral basics.
Copy as — every ecosystem
Tints, shades, and tones of Deep Indigo
Tints (lighter)
Shades (darker)
Color harmonies
Palettes built from Deep Indigo by rotating its hue in OKLCH space. Click any swatch to copy its hex code.
Complementary
Analogous
Triadic
Split-complementary
Tetradic
Monochromatic
Contrast & accessibility
Aa — on white
contrast 7.19:1
AA passAAA passAA large pass
Aa — on black
contrast 2.92:1
AA failAAA failAA large fail
Best text color on a Deep Indigo background: #ffffff
Palettes featuring Deep Indigo
Deep Indigo with its complement
Soft neighbors of Deep Indigo
Deep Indigo triad
Similar colors
- Dusk#4E5481 · ΔE 2.6
- Sailor#445780 · ΔE 3.0
- Wizard#4D5B88 · ΔE 3.1
- Intergalactic#4D516C · ΔE 3.8
- Twilight#4E518B · ΔE 5.0
- Naval Blue#384B6B · ΔE 5.6
Looking for maximum contrast instead? The complement of Deep Indigo is closest to Olive Bark.
Deep Indigo FAQs
What color is Deep Indigo?
Deep Indigo is a dark blue with the hex code #4C567A. In HSL terms it has a hue of 227°, 23% saturation, and 39% lightness.
What is the hex code for Deep Indigo?
The hex code for Deep Indigo is #4C567A. In RGB it's rgb(76, 86, 122), and in CMYK it's cmyk(38%, 30%, 0%, 52%).
What colors go well with Deep Indigo?
Deep Indigo pairs naturally with brown tones from its complementary harmony. Its own tints and shades always work as a monochrome scheme.
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