Color

#1b9bbb

#1b9bbb
hex#1b9bbb
rgbrgb(27, 155, 187)
hslhsl(192, 75%, 42%)
oklchoklch(0.64 0.111 220.4)
Closest name: Blue Ocean (#009dc4)Relative luminance 0.2726

Colors that go with #1b9bbb

Charcoal, Amber and 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.

Real palettes that use #1b9bbb

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bb3b1b

#1bbb8b · #1b4bbb

#bb1b9b · #9bbb1b

Split-complementary

Open in tool →

#bb1b4b · #bb8b1b

#8b1bbb · #bb3b1b · #4bbb1b

Contrast

#1b9bbb as textRatioAAAA largeAAAFix
Aaon white
3.25:1failpassfail
  • AA: use #16819c as the text (4.51:1)
  • AAA: use #116074 as the text (7.12:1)
  • AA: or shift the background to #262626 (4.65:1)
Aaon black
6.45:1passpassfail
  • AAA: use #1ca3c4 as the text (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b9bbb 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

#1b9bbb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b9bbb
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 #1b9bbb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b9bbb-a2b5be-df4e77-1f242d-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