Color

#373deb

#373deb
hex#373deb
rgbrgb(55, 61, 235)
hslhsl(238, 82%, 57%)
oklchoklch(0.49 0.252 270.9)
Closest name: C64 Blue (#003aff)Relative luminance 0.1015

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ebe537

#3797eb · #8b37eb

#eb373d · #3deb37

Split-complementary

Open in tool →

#eb8b37 · #97eb37

#eb3797 · #ebe537 · #37eb8b

Contrast

#373deb as textRatioAAAA largeAAAFix
Aaon white
6.93:1passpassfail
  • AAA: use #3339eb as the text (7.18:1)
Aaon black
3.03:1failpassfail
  • AA: use #6166ef as the text (4.66:1)
  • AAA: use #8b8ef4 as the text (7.27:1)
  • AA: or shift the background to #d1d1d1 (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 #373deb 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

#373deb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #373deb
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 #373deb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/373deb-9f9cc4-df944e-251f2d-e9edf1?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