Cousteau
Also known as: Hoeth Blue, First Landing, Blue Astro, Ethereal Blue
With its cool undertone, Cousteau (#55A9D6) comes across as steady and dependable. Designers reach for it in corporate branding and SaaS products. Its complement lands in orange territory, which makes for striking two-color pairings. Accessibility-wise, it needs a dark backdrop — 8.03:1 on black clears AA.
Cousteau color codes
- HEX
- #55A9D6
- RGB
- rgb(85, 169, 214)
- RGBA
- rgba(85, 169, 214, 1)
- HSL
- hsl(201, 61%, 59%)
- HSV
- hsv(201, 60%, 84%)
- CMYK
- cmyk(60%, 21%, 0%, 16%)
- LAB
- lab(65.4 -16.4 -31.1)
- OKLCH
- oklch(70.1% 0.105 234.4)
Color intelligence
Displays accurately on every screen and translates well to print.
Temperature
cool
Nearest standard colors
- CSS: deepskyblue#00BFFF · ΔE 7.1
- RAL 5024 — Pastel blue#6A93B0 · ΔE 8.4 · 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 Cousteau works
- Web & UI: Best as a button fill, badge, or accent — pair it with white text only at large sizes, and check contrast.
- Interiors: Strong for a whole room, excellent in doses: an accent wall, cabinetry, or a statement chair.
- Fashion: Wears best as the statement piece — a top, scarf, or shoes — against neutral basics.
- 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.
- Branding: A secondary brand color by nature: it supports a stronger primary and shines in illustration.
Copy as — every ecosystem
Tints, shades, and tones of Cousteau
Tints (lighter)
Shades (darker)
Color harmonies
Palettes built from Cousteau 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 2.61:1
AA failAAA failAA large fail
Aa — on black
contrast 8.03:1
AA passAAA passAA large pass
Best text color on a Cousteau background: #000000
Palettes featuring Cousteau
Cousteau with its complement
Soft neighbors of Cousteau
Cousteau triad
Similar colors
- Thalassophile#44AADD · ΔE 1.5
- High Blue#4CA8E0 · ΔE 2.4
- Sub-Zero#57A1CE · ΔE 2.6
- Malibu#66B7E1 · ΔE 4.1
- Blue Burst#309CD0 · ΔE 4.6
- Surgical#59A4C1 · ΔE 4.7
Looking for maximum contrast instead? The complement of Cousteau is closest to Whiskey.
Cousteau FAQs
What color is Cousteau?
Cousteau is a medium blue with the hex code #55A9D6. In HSL terms it has a hue of 201°, 61% saturation, and 59% lightness.
What is the hex code for Cousteau?
The hex code for Cousteau is #55A9D6. In RGB it's rgb(85, 169, 214), and in CMYK it's cmyk(60%, 21%, 0%, 16%).
What colors go well with Cousteau?
Cousteau pairs naturally with orange tones from its complementary harmony, and with red accents from its split-complementary palette. Its own tints and shades always work as a monochrome scheme.
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