Color

#3a1aef

#3a1aef
hex#3a1aef
rgbrgb(58, 26, 239)
hslhsl(249, 87%, 52%)
oklchoklch(0.461 0.279 273.1)
Closest name: Overdue Blue (#4400ff)Relative luminance 0.0787

Colors that go with #3a1aef

Charcoal, Cobalt Blue and Cornflower Blue 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 →

#cfef1a

#1a65ef · #a51aef

#ef3a1a · #1aef3a

Split-complementary

Open in tool →

#efa51a · #65ef1a

#ef1a65 · #cfef1a · #1aefa5

Contrast

#3a1aef as textRatioAAAA largeAAAFix
Aaon white
8.16:1passpasspassPasses AAA — no fix needed.
Aaon black
2.57:1failfailfail
  • AA: use #735df4 as the text (4.6:1)
  • AAA: use #9888f7 as the text (7.2:1)
  • AA: or shift the background to #c2c2c2 (4.58:1)
  • AAA: or shift the background to #f0f0f0 (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3a1aef 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

#3a1aef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a1aef
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 #3a1aef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a1aef-a79cc4-dfae4e-271f2d-e9ecf1?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