Color

#3a65bb

#3a65bb
hex#3a65bb
rgbrgb(58, 101, 187)
hslhsl(220, 53%, 48%)
oklchoklch(0.521 0.144 262.5)
Closest name: God of Rain (#4466cc)Relative luminance 0.1379

Colors that go with #3a65bb

Charcoal, Sea Green 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 →

#bb903a

#3aa6bb · #4f3abb

#bb3a65 · #65bb3a

Split-complementary

Open in tool →

#bb4f3a · #a6bb3a

#bb3aa6 · #bb903a · #3abb4f

Contrast

#3a65bb as textRatioAAAA largeAAAFix
Aaon white
5.59:1passpassfail
  • AAA: use #3156a0 as the text (7.07:1)
Aaon black
3.76:1failpassfail
  • AA: use #4872c7 as the text (4.51:1)
  • AAA: use #7696d5 as the text (7.09:1)
  • AA: or shift the background to #e8e8e8 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3a65bb as the background.

Brands using this color

Fonts for this mood

#3a65bb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a65bb
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 #3a65bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a65bb-9ca5c4-df694e-211f2d-e9f0f1?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