Color

#351acb

#351acb
hex#351acb
rgbrgb(53, 26, 203)
hslhsl(249, 77%, 45%)
oklchoklch(0.415 0.243 274.6)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0581

Colors that go with #351acb

Charcoal, Cornflower Blue and Crimson 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 →

#b1cb1a

#1a58cb · #8d1acb

#cb351a · #1acb35

Split-complementary

Open in tool →

#cb8d1a · #58cb1a

#cb1a58 · #b1cb1a · #1acb8d

Contrast

#351acb as textRatioAAAA largeAAAFix
Aaon white
9.72:1passpasspassPasses AAA — no fix needed.
Aaon black
2.16:1failfailfail
  • AA: use #7661ea as the text (4.67:1)
  • AAA: use #998af0 as the text (7.25:1)
  • AA: or shift the background to #b3b3b3 (4.63:1)
  • AAA: or shift the background to #dbdbdb (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #351acb 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

#351acb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #351acb
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 #351acb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/351acb-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