Color

#2f3bc1

#2f3bc1
hex#2f3bc1
rgbrgb(47, 59, 193)
hslhsl(235, 61%, 47%)
oklchoklch(0.44 0.205 270.7)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0758

Colors that go with #2f3bc1

Charcoal, Sea Green and Steel 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 →

#c1b52f

#2f84c1 · #6c2fc1

#c12f3b · #3bc12f

Split-complementary

Open in tool →

#c16c2f · #84c12f

#c12f84 · #c1b52f · #2fc16c

Contrast

#2f3bc1 as textRatioAAAA largeAAAFix
Aaon white
8.34:1passpasspassPasses AAA — no fix needed.
Aaon black
2.52:1failfailfail
  • AA: use #636dd9 as the text (4.72:1)
  • AAA: use #888fe2 as the text (7.07:1)
  • AA: or shift the background to #bfbfbf (4.54:1)
  • AAA: or shift the background to #ededed (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 #2f3bc1 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

#2f3bc1 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2f3bc1
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 #2f3bc1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2f3bc1-9e9cc4-df8d4e-241f2d-e9eef1?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