Color

#3d6366

#3d6366
hex#3d6366
rgbrgb(61, 99, 102)
hslhsl(184, 25%, 32%)
oklchoklch(0.473 0.043 202.2)
Closest name: After the Storm (#33616a)Relative luminance 0.1088

Colors that go with #3d6366

Sienna, Cadet Blue 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#66403d

#3d6654 · #3d4f66

#663d63 · #63663d

Split-complementary

Open in tool →

#663d4f · #66543d

#543d66 · #66403d · #4f663d

Contrast

#3d6366 as textRatioAAAA largeAAAFix
Aaon white
6.61:1passpassfail
  • AAA: use #395d60 as the text (7.22:1)
Aaon black
3.18:1failpassfail
  • AA: use #4d7c80 as the text (4.51:1)
  • AAA: use #669fa3 as the text (7.05:1)
  • AA: or shift the background to #d6d6d6 (4.55:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d6366 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

mcpConnect your agent — build around #3d6366
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 #3d6366 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d6366-a2b9be-df4e8a-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