Color

#3f6d97

#3f6d97
hex#3f6d97
rgbrgb(63, 109, 151)
hslhsl(209, 41%, 42%)
oklchoklch(0.52 0.084 247.6)
Closest name: Harbour Blue (#417491)Relative luminance 0.1423

Colors that go with #3f6d97

Charcoal, Sienna 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#976a3f

#3f9796 · #3f4197

#973f6d · #6d973f

Split-complementary

Open in tool →

#973f41 · #97963f

#963f97 · #976a3f · #41973f

Contrast

#3f6d97 as textRatioAAAA largeAAAFix
Aaon white
5.46:1passpassfail
  • AAA: use #355a7e as the text (7.2:1)
Aaon black
3.85:1failpassfail
  • AA: use #4779a9 as the text (4.58:1)
  • AAA: use #6f9ac3 as the text (7.09:1)
  • AA: or shift the background to #ebebeb (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f6d97 as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#3f6d97 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3f6d97
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 #3f6d97 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f6d97-9cacc4-df4e4e-1f212d-e9f1f1?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