Color

#3d12ca

#3d12ca
hex#3d12ca
rgbrgb(61, 18, 202)
hslhsl(254, 84%, 43%)
oklchoklch(0.414 0.244 277.8)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0569

Colors that go with #3d12ca

Charcoal, Cornflower Blue and Denim 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 →

#9fca12

#1243ca · #9912ca

#ca3d12 · #12ca3d

Split-complementary

Open in tool →

#ca9912 · #43ca12

#ca1243 · #9fca12 · #12ca99

Contrast

#3d12ca as textRatioAAAA largeAAAFix
Aaon white
9.82:1passpasspassPasses AAA — no fix needed.
Aaon black
2.14:1failfailfail
  • AA: use #7e5bf1 as the text (4.65:1)
  • AAA: use #9f85f4 as the text (7.14:1)
  • AA: or shift the background to #b0b0b0 (4.53:1)
  • AAA: or shift the background to #dbdbdb (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d12ca 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

#3d12ca reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d12ca
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 #3d12ca and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d12ca-aa9cc4-dfbb4e-291f2d-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