Color

#3d788a

#3d788a
hex#3d788a
rgbrgb(61, 120, 138)
hslhsl(194, 39%, 39%)
oklchoklch(0.54 0.067 220.2)
Closest name: Harbour Blue (#417491)Relative luminance 0.1626

Colors that go with #3d788a

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 →

#8a4f3d

#3d8a76 · #3d518a

#8a3d78 · #788a3d

Split-complementary

Open in tool →

#8a3d51 · #8a763d

#763d8a · #8a4f3d · #518a3d

Contrast

#3d788a as textRatioAAAA largeAAAFix
Aaon white
4.94:1passpassfail
  • AAA: use #305f6e as the text (7.03:1)
Aaon black
4.25:1failpassfail
  • AA: use #407e91 as the text (4.61:1)
  • AAA: use #58a0b6 as the text (7.12:1)
  • AA: or shift the background to #f5f5f5 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d788a 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

#3d788a reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d788a
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 #3d788a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d788a-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