Color

#370dce

#370dce
hex#370dce
rgbrgb(55, 13, 206)
hslhsl(253, 88%, 43%)
oklchoklch(0.412 0.251 275.4)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0556

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a4ce0d

#0d44ce · #970dce

#ce370d · #0dce37

Split-complementary

Open in tool →

#ce970d · #44ce0d

#ce0d44 · #a4ce0d · #0dce97

Contrast

#370dce as textRatioAAAA largeAAAFix
Aaon white
9.95:1passpasspassPasses AAA — no fix needed.
Aaon black
2.11:1failfailfail
  • AA: use #7d5cf5 as the text (4.72:1)
  • AAA: use #9f87f7 as the text (7.28:1)
  • AA: or shift the background to #b0b0b0 (4.59:1)
  • AAA: or shift the background to #d9d9d9 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #370dce 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

#370dce reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #370dce
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 #370dce and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/370dce-a99cc4-dfb84e-281f2d-e9ebf1?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