Color

#3969db

#3969db
hex#3969db
rgbrgb(57, 105, 219)
hslhsl(222, 69%, 54%)
oklchoklch(0.552 0.183 264.1)
Closest name: royalblue (#4169e1)Relative luminance 0.1609

Tints & shades

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

Harmonies

Complementary

Open in tool →

#dbaa39

#39badb · #5939db

#db3969 · #69db39

Split-complementary

Open in tool →

#db5939 · #badb39

#db39ba · #dbaa39 · #39db59

Contrast

#3969db as textRatioAAAA largeAAAFix
Aaon white
4.98:1passpassfail
  • AAA: use #2351be as the text (7.02:1)
Aaon black
4.22:1failpassfail
  • AA: use #4170dc as the text (4.58:1)
  • AAA: use #7194e5 as the text (7.07:1)
  • AA: or shift the background to #f5f5f5 (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3969db 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

#3969db reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3969db
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 #3969db and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3969db-9ca3c4-df6e4e-211f2d-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