Color

#373aeb

#373aeb
hex#373aeb
rgbrgb(55, 58, 235)
hslhsl(239, 82%, 57%)
oklchoklch(0.486 0.254 271.2)
Closest name: Blustering Blue (#4411ff)Relative luminance 0.0984

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ebe837

#3794eb · #8e37eb

#eb373a · #3aeb37

Split-complementary

Open in tool →

#eb8e37 · #94eb37

#eb3794 · #ebe837 · #37eb8e

Contrast

#373aeb as textRatioAAAA largeAAAFix
Aaon white
7.08:1passpasspassPasses AAA — no fix needed.
Aaon black
2.97:1failfailfail
  • AA: use #6164ef as the text (4.58:1)
  • AAA: use #8b8df4 as the text (7.21:1)
  • AA: or shift the background to #cfcfcf (4.54:1)
  • AAA: or shift the background to #ffffff (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #373aeb 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

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

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

tool url/palettes/new/373aeb-a09cc4-df964e-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