Color

#3485cb

#3485cb
hex#3485cb
rgbrgb(52, 133, 203)
hslhsl(208, 59%, 50%)
oklchoklch(0.601 0.132 248.3)
Closest name: steelblue (#4682b4)Relative luminance 0.2182

Colors that go with #3485cb

Charcoal, Crimson 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 →

#cb7a34

#34cbc6 · #3439cb

#cb3485 · #85cb34

Split-complementary

Open in tool →

#cb3439 · #cbc634

#c634cb · #cb7a34 · #39cb34

Contrast

#3485cb as textRatioAAAA largeAAAFix
Aaon white
3.92:1failpassfail
  • AA: use #307abb as the text (4.54:1)
  • AAA: use #245a8a as the text (7.23:1)
  • AA: or shift the background to #171717 (4.58:1)
Aaon black
5.36:1passpassfail
  • AAA: use #599bd4 as the text (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3485cb as the background.

Brands using this color

Fonts for this mood

#3485cb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3485cb
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 #3485cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3485cb-9cadc4-df4e51-1f212d-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