Color

#3758cd

#3758cd
hex#3758cd
rgbrgb(55, 88, 205)
hslhsl(227, 60%, 51%)
oklchoklch(0.507 0.185 267.4)
Closest name: God of Rain (#4466cc)Relative luminance 0.122

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cdad37

#37a3cd · #6237cd

#cd3758 · #58cd37

Split-complementary

Open in tool →

#cd6237 · #a3cd37

#cd37a3 · #cdad37 · #37cd62

Contrast

#3758cd as textRatioAAAA largeAAAFix
Aaon white
6.1:1passpassfail
  • AAA: use #2f4dbc as the text (7.22:1)
Aaon black
3.44:1failpassfail
  • AA: use #546fd4 as the text (4.6:1)
  • AAA: use #7c92de as the text (7.02:1)
  • AA: or shift the background to #dedede (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 #3758cd 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

#3758cd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3758cd
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 #3758cd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3758cd-9ca0c4-df7a4e-221f2d-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