Color

#3750cd

#3750cd
hex#3750cd
rgbrgb(55, 80, 205)
hslhsl(230, 60%, 51%)
oklchoklch(0.492 0.195 269.2)
Closest name: Denim (#2243b6)Relative luminance 0.1096

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cdb437

#379bcd · #6937cd

#cd3750 · #50cd37

Split-complementary

Open in tool →

#cd6937 · #9bcd37

#cd379b · #cdb437 · #37cd69

Contrast

#3750cd as textRatioAAAA largeAAAFix
Aaon white
6.58:1passpassfail
  • AAA: use #324bc8 as the text (7.06:1)
Aaon black
3.19:1failpassfail
  • AA: use #586dd5 as the text (4.56:1)
  • AAA: use #8594e0 as the text (7.31:1)
  • AA: or shift the background to #d6d6d6 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3750cd 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

#3750cd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3750cd
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 #3750cd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3750cd-9c9ec4-df814e-231f2d-e9eef1?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