Color

#3f989d

#3f989d
hex#3f989d
rgbrgb(63, 152, 157)
hslhsl(183, 43%, 43%)
oklchoklch(0.628 0.084 200.3)
Closest name: Baltic (#279d9f)Relative luminance 0.2595

Colors that go with #3f989d

Charcoal, Copper and Crimson 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 #3f989d

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9d433f

#3f9d72 · #3f699d

#9d3f98 · #989d3f

Split-complementary

Open in tool →

#9d3f69 · #9d723f

#723f9d · #9d433f · #699d3f

Contrast

#3f989d as textRatioAAAA largeAAAFix
Aaon white
3.39:1failpassfail
  • AA: use #347f83 as the text (4.66:1)
  • AAA: use #275f62 as the text (7.24:1)
  • AA: or shift the background to #242424 (4.58:1)
Aaon black
6.19:1passpassfail
  • AAA: use #43a3a8 as the text (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f989d 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

#3f989d reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3f989d
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 #3f989d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f989d-a2b9be-d4598e-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