Color

#310bbc

#310bbc
hex#310bbc
rgbrgb(49, 11, 188)
hslhsl(253, 89%, 39%)
oklchoklch(0.385 0.234 275.2)
Closest name: Galactic Highway (#3311bb)Relative luminance 0.0452

Tints & shades

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

Harmonies

Complementary

Open in tool →

#96bc0b

#0b3dbc · #8a0bbc

#bc310b · #0bbc31

Split-complementary

Open in tool →

#bc8a0b · #3dbc0b

#bc0b3d · #96bc0b · #0bbc8a

Contrast

#310bbc as textRatioAAAA largeAAAFix
Aaon white
11.03:1passpasspassPasses AAA — no fix needed.
Aaon black
1.9:1failfailfail
  • AA: use #7d5bf5 as the text (4.69:1)
  • AAA: use #9f87f8 as the text (7.3:1)
  • AA: or shift the background to #a6a6a6 (4.53:1)
  • AAA: or shift the background to #cfcfcf (7.08:1)

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

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

mcpConnect your agent — build around #310bbc
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

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

analyze #310bbc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/310bbc-a99cc4-dfb84e-281f2d-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