Color

#3550bb

#3550bb
hex#3550bb
rgbrgb(53, 80, 187)
hslhsl(228, 56%, 47%)
oklchoklch(0.476 0.171 268.4)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1008

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bba035

#3593bb · #5d35bb

#bb3550 · #50bb35

Split-complementary

Open in tool →

#bb5d35 · #93bb35

#bb3593 · #bba035 · #35bb5d

Contrast

#3550bb as textRatioAAAA largeAAAFix
Aaon white
6.96:1passpassfail
  • AAA: use #344eb7 as the text (7.19:1)
Aaon black
3.02:1failpassfail
  • AA: use #5870d0 as the text (4.64:1)
  • AAA: use #8092db as the text (7.05:1)
  • AA: or shift the background to #d1d1d1 (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 #3550bb 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

#3550bb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3550bb
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 #3550bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3550bb-9c9fc4-df7c4e-231f2d-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