Poseidon
Also known as: Blue Opal, Sir Edmund, Alpine Race, Blue Accolade
With its cool undertone, Poseidon (#143C5D) comes across as calm and trustworthy. Designers reach for it in finance apps and trust-driven interfaces. Poseidon plays well with brown tones — the harmonies below show exactly which ones. On white it reads clearly at 11.45:1 contrast — safe for body text under WCAG AA.
Poseidon color codes
- HEX
- #143C5D
- RGB
- rgb(20, 60, 93)
- RGBA
- rgba(20, 60, 93, 1)
- HSL
- hsl(207, 65%, 22%)
- HSV
- hsv(207, 78%, 36%)
- CMYK
- cmyk(78%, 35%, 0%, 64%)
- LAB
- lab(23.9 -4.5 -24.2)
- OKLCH
- oklch(34.6% 0.073 247.0)
Color intelligence
Displays accurately on every screen and translates well to print.
Temperature
cool
Nearest standard colors
- CSS: darkslateblue#483D8B · ΔE 12.6
- RAL 5001 — Green blue#1F4764 · ΔE 4.1 · 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 Poseidon 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 Poseidon
Tints (lighter)
Shades (darker)
Color harmonies
Palettes built from Poseidon 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 11.45:1
AA passAAA passAA large pass
Aa — on black
contrast 1.83:1
AA failAAA failAA large fail
Best text color on a Poseidon background: #ffffff
Palettes featuring Poseidon
Poseidon with its complement
Soft neighbors of Poseidon
Poseidon triad
Similar colors
- Aegean Blue#1B416F · ΔE 3.7
- Nautilus#273C5A · ΔE 3.9
- Nightlife#27426B · ΔE 4.5
- Pi#314159 · ΔE 5.4
- Marine#042E60 · ΔE 5.9
- Blue Funk#2D4470 · ΔE 5.9
Looking for maximum contrast instead? The complement of Poseidon is closest to Pineapple.
Poseidon FAQs
What color is Poseidon?
Poseidon is a dark blue with the hex code #143C5D. In HSL terms it has a hue of 207°, 65% saturation, and 22% lightness.
What is the hex code for Poseidon?
The hex code for Poseidon is #143C5D. In RGB it's rgb(20, 60, 93), and in CMYK it's cmyk(78%, 35%, 0%, 64%).
What colors go well with Poseidon?
Poseidon pairs naturally with brown tones from its complementary harmony. Its own tints and shades always work as a monochrome scheme.
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