Color

#373afb

#373afb
hex#373afb
rgbrgb(55, 58, 251)
hslhsl(239, 96%, 60%)
oklchoklch(0.503 0.272 270.5)
Closest name: C64 Blue (#003aff)Relative luminance 0.108

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbf837

#379cfb · #9637fb

#fb373a · #3afb37

Split-complementary

Open in tool →

#fb9637 · #9cfb37

#fb379c · #fbf837 · #37fb96

Contrast

#373afb as textRatioAAAA largeAAAFix
Aaon white
6.64:1passpassfail
  • AAA: use #2d31fb as the text (7.13:1)
Aaon black
3.16:1failpassfail
  • AA: use #5f62fc as the text (4.64:1)
  • AAA: use #8789fd as the text (7.03:1)
  • AA: or shift the background to #d6d6d6 (4.57:1)

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

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

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

tool url/palettes/new/373afb-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