Color

#310cac

#310cac
hex#310cac
rgbrgb(49, 12, 172)
hslhsl(254, 87%, 36%)
oklchoklch(0.365 0.217 277.2)
Closest name: Galactic Highway (#3311bb)Relative luminance 0.0389

Colors that go with #310cac

Charcoal, Steel 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 →

#86ac0c

#0c37ac · #810cac

#ac310c · #0cac31

Split-complementary

Open in tool →

#ac810c · #37ac0c

#ac0c37 · #86ac0c · #0cac81

Contrast

#310cac as textRatioAAAA largeAAAFix
Aaon white
11.81:1passpasspassPasses AAA — no fix needed.
Aaon black
1.78:1failfailfail
  • AA: use #7c58f3 as the text (4.55:1)
  • AAA: use #9e83f6 as the text (7.03:1)
  • AA: or shift the background to #a1a1a1 (4.57:1)
  • AAA: or shift the background to #c9c9c9 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #310cac 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

#310cac reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #310cac
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 #310cac and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/310cac-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