Color

#3bbee3

#3bbee3
hex#3bbee3
rgbrgb(59, 190, 227)
hslhsl(193, 75%, 56%)
oklchoklch(0.747 0.121 221.1)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.433

Colors that go with #3bbee3

Charcoal, Denim and Dodger Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#e35f3b

#3be3b3 · #3b6ae3

#e33bbe · #bee33b

Split-complementary

Open in tool →

#e33b6a · #e3b33b

#b33be3 · #e35f3b · #6ae33b

Contrast

#3bbee3 as textRatioAAAA largeAAAFix
Aaon white
2.17:1failfailfail
  • AA: use #167f9c as the text (4.62:1)
  • AAA: use #115e74 as the text (7.3:1)
  • AA: or shift the background to #424242 (4.62:1)
  • AAA: or shift the background to #242424 (7.14:1)
Aaon black
9.66:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3bbee3 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#3bbee3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3bbee3
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #3bbee3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3bbee3-a2b5be-df4e75-1f242d-e9f1ef?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md