Color

#365bdd

#365bdd
hex#365bdd
rgbrgb(54, 91, 221)
hslhsl(227, 71%, 54%)
oklchoklch(0.525 0.203 266.9)
Closest name: Arcane Brew (#5260e1)Relative luminance 0.1349

Colors that go with #365bdd

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 →

#ddb936

#36aedd · #6636dd

#dd365b · #5bdd36

Split-complementary

Open in tool →

#dd6636 · #aedd36

#dd36ae · #ddb936 · #36dd66

Contrast

#365bdd as textRatioAAAA largeAAAFix
Aaon white
5.68:1passpassfail
  • AAA: use #2349d1 as the text (7.13:1)
Aaon black
3.7:1failpassfail
  • AA: use #4c6ce1 as the text (4.54:1)
  • AAA: use #7c94e9 as the text (7.27:1)
  • AA: or shift the background to #e6e6e6 (4.55:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #365bdd as the background.

Brands using this color

Fonts for this mood

#365bdd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #365bdd
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 #365bdd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/365bdd-9ca0c4-df7a4e-221f2d-e9eff1?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