Color

#3685ce

#3685ce
hex#3685ce
rgbrgb(54, 133, 206)
hslhsl(209, 61%, 51%)
oklchoklch(0.603 0.135 249.6)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2202

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ce8036

#36cecc · #3638ce

#ce3685 · #85ce36

Split-complementary

Open in tool →

#ce3638 · #cecc36

#cc36ce · #ce8036 · #38ce36

Contrast

#3685ce as textRatioAAAA largeAAAFix
Aaon white
3.89:1failpassfail
  • AA: use #2e78bd as the text (4.63:1)
  • AAA: use #235b90 as the text (7.07:1)
  • AA: or shift the background to #171717 (4.61:1)
Aaon black
5.4:1passpassfail
  • AAA: use #5b9bd7 as the text (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3685ce 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

#3685ce reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3685ce
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 #3685ce and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3685ce-9cacc4-df4e4e-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