Blue Hour
Also known as: UA Blue, Egyptian Blue, Royal Azure, International Blue
Blue Hour brings a cool and professional feel to any palette. This rich blue is a natural fit for corporate branding and SaaS products. Blue Hour plays well with brown tones — the harmonies below show exactly which ones. Accessibility-wise, it clears AA for text on white at 10.10:1.
Blue Hour color codes
- HEX
- #0034AB
- RGB
- rgb(0, 52, 171)
- RGBA
- rgba(0, 52, 171, 1)
- HSL
- hsl(222, 100%, 34%)
- HSV
- hsv(222, 100%, 67%)
- CMYK
- cmyk(100%, 70%, 0%, 33%)
- LAB
- lab(26.5 26.7 -68.5)
- OKLCH
- oklch(39.1% 0.195 262.9)
Color intelligence
Displays accurately on every screen. Vivid colors like this typically lose some intensity in CMYK print — request a physical proof for brand-critical work.
Temperature
cool
Nearest standard colors
- CSS: darkslateblue#483D8B · ΔE 8.6
- RAL 5002 — Ultramarine blue#2B2C7C · ΔE 7.5 · 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 Blue Hour works
- Web & UI: Use it directly for text on light surfaces; it clears AA contrast without adjustment.
- Interiors: Use it where you want the eye to land — front door, built-ins, or one bold wall.
- Fashion: One garment in this color carries an outfit; two starts to compete.
- Branding: The safest brand-primary family there is; differentiate with an unexpected accent.
- Web & UI: Use it decoratively — dividers, chart series, illustration accents — and let neutrals carry the type.
- Branding: Best in a brand's supporting palette — packaging interiors, patterns, campaign accents.
Copy as — every ecosystem
Tints, shades, and tones of Blue Hour
Tints (lighter)
Shades (darker)
Color harmonies
Palettes built from Blue Hour 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 10.10:1
AA passAAA passAA large pass
Aa — on black
contrast 2.08:1
AA failAAA failAA large fail
Best text color on a Blue Hour background: #ffffff
Palettes featuring Blue Hour
Blue Hour with its complement
Soft neighbors of Blue Hour
Blue Hour triad
Similar colors
- Smalt#003399 · ΔE 2.6
- Bluebell#333399 · ΔE 4.1
- Denim#2243B6 · ΔE 4.6
- Space Dust#002299 · ΔE 5.2
- Dark Galaxy#0018A8 · ΔE 6.8
- Blueberry#464196 · ΔE 7.4
Looking for maximum contrast instead? The complement of Blue Hour is closest to Pineapple.
Blue Hour FAQs
What color is Blue Hour?
Blue Hour is a dark blue with the hex code #0034AB. In HSL terms it has a hue of 222°, 100% saturation, and 34% lightness.
What is the hex code for Blue Hour?
The hex code for Blue Hour is #0034AB. In RGB it's rgb(0, 52, 171), and in CMYK it's cmyk(100%, 70%, 0%, 33%).
What colors go well with Blue Hour?
Blue Hour pairs naturally with brown tones from its complementary harmony. Its own tints and shades always work as a monochrome scheme.
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