Color

#2a9bcf

#2a9bcf
hex#2a9bcf
rgbrgb(42, 155, 207)
hslhsl(199, 66%, 49%)
oklchoklch(0.652 0.123 233.9)
Closest name: Blue Burst (#309cd0)Relative luminance 0.2844

Colors that go with #2a9bcf

Charcoal, Orange Red and Amber 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 #2a9bcf

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cf5f2a

#2acfb1 · #2a49cf

#cf2a9b · #9bcf2a

Split-complementary

Open in tool →

#cf2a49 · #cfb12a

#b12acf · #cf5f2a · #49cf2a

Contrast

#2a9bcf as textRatioAAAA largeAAAFix
Aaon white
3.14:1failpassfail
  • AA: use #227ca5 as the text (4.67:1)
  • AAA: use #1a5f7f as the text (7.03:1)
  • AA: or shift the background to #2b2b2b (4.51:1)
Aaon black
6.69:1passpassfail
  • AAA: use #30a0d5 as the text (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2a9bcf as the background.

Brands using this color

Fonts for this mood

#2a9bcf reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2a9bcf
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 #2a9bcf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2a9bcf-9cb3c4-df4e66-1f232d-e9f1f0?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