Deep Indigo
Also known as: Alpha Centauri , Nyctophobia Blue , Blue Review , Dark Iris
Deep Indigo brings a cool and professional feel to a palette. This rich blue suits 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).
Reference
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)
Analysis
Color intelligence
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Gamut
The full range of colors a device or space can show. sRGB is the common screen gamut; Display P3 is wider. A color outside a gamut cannot be shown accurately there and must be mapped inward.Full glossary entry →Displays accurately on every screen and translates well to print.
Temperature
Undertone
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cool
Nearest standard colors
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Delta E (ΔE)
A measure of how different two colors look. Below 1 the difference is invisible to almost everyone; below 2.3 most people can't tell them apart; above 10 they are clearly different colors. We use CIEDE2000, the modern standard.Full glossary entry →
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Delta E (ΔE)
A measure of how different two colors look. Below 1 the difference is invisible to almost everyone; below 2.3 most people can't tell them apart; above 10 they are clearly different colors. We use CIEDE2000, the modern standard.Full glossary entry →- 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, and empty-state illustrations, but not text.
- Fashion: Wears best as the statement piece, a top, scarf, or shoes, against neutral basics.
Copy as: every ecosystem
Variations
Tints, shades, and tones of Deep Indigo
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Tint
A color mixed with white, which raises its lightness. Pink is a tint of red. Tints feel softer and more open than the base color.Full glossary entry →
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Tint
A color mixed with white, which raises its lightness. Pink is a tint of red. Tints feel softer and more open than the base color.Full glossary entry →Tints (lighter)
Shades (darker)
Harmonies
Color harmonies
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Complementary colors
Two colors opposite each other on the wheel. They create the strongest contrast and make each other look more intense, so they work best used unevenly.Full glossary entry →
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Complementary colors
Two colors opposite each other on the wheel. They create the strongest contrast and make each other look more intense, so they work best used unevenly.Full glossary entry →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
Accessibility
Contrast & accessibility
Aa on white
contrast 7.19:1
AA pass AAA pass AA large pass
Aa on black
contrast 2.92:1
AA fail AAA fail AA large fail
Best text color on a Deep Indigo background: #ffffff
Palettes
Palettes featuring Deep Indigo
Deep Indigo with its complement
Soft neighbors of Deep Indigo
Deep Indigo triad
Explore
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 .
FAQ
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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