Color

#3291b3

#3291b3
hex#3291b3
rgbrgb(50, 145, 179)
hslhsl(196, 56%, 45%)
oklchoklch(0.616 0.1 226)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2418

Colors that go with #3291b3

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b35532

#32b395 · #3250b3

#b33291 · #91b332

Split-complementary

Open in tool →

#b33250 · #b39532

#9532b3 · #b35532 · #50b332

Contrast

#3291b3 as textRatioAAAA largeAAAFix
Aaon white
3.6:1failpassfail
  • AA: use #2c7d9b as the text (4.65:1)
  • AAA: use #215d73 as the text (7.3:1)
  • AA: or shift the background to #1f1f1f (4.58:1)
Aaon black
5.84:1passpassfail
  • AAA: use #38a1c7 as the text (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3291b3 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

#3291b3 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3291b3
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 #3291b3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3291b3-9cb5c4-df4e6e-1f232d-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