Color

#3830cf

#3830cf
hex#3830cf
rgbrgb(56, 48, 207)
hslhsl(243, 62%, 50%)
oklchoklch(0.444 0.231 273.8)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0746

Colors that go with #3830cf

Charcoal, Sea Green and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#c7cf30

#3078cf · #8730cf

#cf3830 · #30cf38

Split-complementary

Open in tool →

#cf8730 · #78cf30

#cf3078 · #c7cf30 · #30cf87

Contrast

#3830cf as textRatioAAAA largeAAAFix
Aaon white
8.43:1passpasspassPasses AAA — no fix needed.
Aaon black
2.49:1failfailfail
  • AA: use #6c66db as the text (4.56:1)
  • AAA: use #948fe5 as the text (7.32:1)
  • AA: or shift the background to #bfbfbf (4.58:1)
  • AAA: or shift the background to #ebebeb (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3830cf 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

#3830cf reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3830cf
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #3830cf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3830cf-a39cc4-dfa04e-261f2d-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