Color

#1d9aaa

#1d9aaa
hex#1d9aaa
rgbrgb(29, 154, 170)
hslhsl(187, 71%, 39%)
oklchoklch(0.63 0.103 208.5)
Closest name: Baltic (#279d9f)Relative luminance 0.2627

Colors that go with #1d9aaa

Charcoal, Red and Copper 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 #1d9aaa

Tints & shades

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

Harmonies

Complementary

Open in tool →

#aa2d1d

#1daa74 · #1d53aa

#aa1d9a · #9aaa1d

Split-complementary

Open in tool →

#aa1d53 · #aa741d

#741daa · #aa2d1d · #53aa1d

Contrast

#1d9aaa as textRatioAAAA largeAAAFix
Aaon white
3.36:1failpassfail
  • AA: use #188290 as the text (4.53:1)
  • AAA: use #12626d as the text (7.01:1)
  • AA: or shift the background to #262626 (4.51:1)
Aaon black
6.25:1passpassfail
  • AAA: use #1fa5b7 as the text (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1d9aaa 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

#1d9aaa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1d9aaa
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 #1d9aaa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1d9aaa-a2b8be-df4e83-1f262d-e9f1ee?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