Color

#3d9fbd

#3d9fbd
hex#3d9fbd
rgbrgb(61, 159, 189)
hslhsl(194, 51%, 49%)
oklchoklch(0.658 0.1 221.8)
Closest name: Blue Ocean (#009dc4)Relative luminance 0.2946

Colors that go with #3d9fbd

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 #3d9fbd

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bd5b3d

#3dbd9b · #3d5fbd

#bd3d9f · #9fbd3d

Split-complementary

Open in tool →

#bd3d5f · #bd9b3d

#9b3dbd · #bd5b3d · #5fbd3d

Contrast

#3d9fbd as textRatioAAAA largeAAAFix
Aaon white
3.05:1failpassfail
  • AA: use #317f96 as the text (4.56:1)
  • AAA: use #245e70 as the text (7.22:1)
  • AA: or shift the background to #2b2b2b (4.65:1)
Aaon black
6.89:1passpassfail
  • AAA: use #3ea2c1 as the text (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d9fbd 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

#3d9fbd reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d9fbd
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 #3d9fbd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d9fbd-9cb6c4-df4e72-1f242d-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