Color

#3787ae

#3787ae
hex#3787ae
rgbrgb(55, 135, 174)
hslhsl(200, 52%, 45%)
oklchoklch(0.591 0.097 233.1)
Closest name: steelblue (#4682b4)Relative luminance 0.212

Colors that go with #3787ae

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 #3787ae

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ae5f37

#37ae9b · #374bae

#ae3787 · #87ae37

Split-complementary

Open in tool →

#ae374b · #ae9b37

#9b37ae · #ae5f37 · #4bae37

Contrast

#3787ae as textRatioAAAA largeAAAFix
Aaon white
4.01:1failpassfail
  • AA: use #337ea3 as the text (4.51:1)
  • AAA: use #265d78 as the text (7.19:1)
  • AA: or shift the background to #141414 (4.6:1)
Aaon black
5.24:1passpassfail
  • AAA: use #4d9ec7 as the text (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3787ae 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

#3787ae reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3787ae
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 #3787ae and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3787ae-9cb2c4-df4e64-1f232d-e9f1f0?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