Seaside

Also known as: Stillwater, Nirvana Jewel, Explorer Blue, Aqua Sea

Seaside brings a cool and clear feel to any palette. This medium cyan is a natural fit for water themes and healthcare apps. Match it with red accents when the design calls for energy over calm. Accessibility-wise, it needs a dark backdrop — 7.50:1 on black clears AA.

Seaside color codes

HEX
#66A4B0
RGB
rgb(102, 164, 176)
RGBA
rgba(102, 164, 176, 1)
HSL
hsl(190, 32%, 55%)
HSV
hsv(190, 42%, 69%)
CMYK
cmyk(42%, 7%, 0%, 31%)
LAB
lab(63.5 -18.4 -12.9)
OKLCH
oklch(68.1% 0.066 211.2)

Color intelligence

sRGB safe

Displays accurately on every screen and translates well to print.

Temperature

CoolWarm

cool

Nearest standard colors

  • CSS: cadetblue#5F9EA0 · ΔE 4.9
  • RAL 6034 — Pastel turquoise#7FB0B2 · ΔE 5.7 · 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 Seaside works

  • Web & UI: A supporting-cast color for UI: chart fills, tags, empty-state illustrations — not text.
  • Interiors: Soft and low-saturation — a candidate for full walls, where vivid colors overwhelm.
  • 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.
  • Interiors: Strong for a whole room, excellent in doses: an accent wall, cabinetry, or a statement chair.
  • 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 Seaside

Tints (lighter)

Shades (darker)

Tones (muted)

Color harmonies

Palettes built from Seaside 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 2.80:1

AA failAAA failAA large fail

Aa — on black

contrast 7.50:1

AA passAAA passAA large pass

Best text color on a Seaside background: #000000

Palettes featuring Seaside

Seaside with its complement

Soft neighbors of Seaside

Seaside triad

Similar colors

Looking for maximum contrast instead? The complement of Seaside is closest to Whisky.

Seaside FAQs

What color is Seaside?

Seaside is a medium cyan with the hex code #66A4B0. In HSL terms it has a hue of 190°, 32% saturation, and 55% lightness.

What is the hex code for Seaside?

The hex code for Seaside is #66A4B0. In RGB it's rgb(102, 164, 176), and in CMYK it's cmyk(42%, 7%, 0%, 31%).

What colors go well with Seaside?

Seaside pairs naturally with red tones from its complementary harmony. Its own tints and shades always work as a monochrome scheme.

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