Color

#373efb

#373efb
hex#373efb
rgbrgb(55, 62, 251)
hslhsl(238, 96%, 60%)
oklchoklch(0.508 0.269 270.3)
Closest name: C64 Blue (#003aff)Relative luminance 0.1122

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbf437

#37a0fb · #9237fb

#fb373e · #3efb37

Split-complementary

Open in tool →

#fb9237 · #a0fb37

#fb37a0 · #fbf437 · #37fb92

Contrast

#373efb as textRatioAAAA largeAAAFix
Aaon white
6.47:1passpassfail
  • AAA: use #2d34fb as the text (7.01:1)
Aaon black
3.24:1failpassfail
  • AA: use #5f64fc as the text (4.72:1)
  • AAA: use #878bfd as the text (7.14:1)
  • AA: or shift the background to #d9d9d9 (4.59:1)

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

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

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

tool url/palettes/new/373efb-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