Color

#366edd

#366edd
hex#366edd
rgbrgb(54, 110, 221)
hslhsl(220, 71%, 54%)
oklchoklch(0.563 0.18 262.2)
Closest name: royalblue (#4169e1)Relative luminance 0.1716

Tints & shades

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

Harmonies

Complementary

Open in tool →

#dda536

#36c1dd · #5236dd

#dd366e · #6edd36

Split-complementary

Open in tool →

#dd5236 · #c1dd36

#dd36c1 · #dda536 · #36dd52

Contrast

#366edd as textRatioAAAA largeAAAFix
Aaon white
4.74:1passpassfail
  • AAA: use #1f52b7 as the text (7.12:1)
Aaon black
4.43:1failpassfail
  • AA: use #3b71de as the text (4.6:1)
  • AAA: use #6b94e6 as the text (7:1)
  • AA: or shift the background to #fafafa (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #366edd as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#366edd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #366edd
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #366edd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/366edd-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