Color

#2d3db9

#2d3db9
hex#2d3db9
rgbrgb(45, 61, 185)
hslhsl(233, 61%, 45%)
oklchoklch(0.435 0.194 270.1)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.074

Colors that go with #2d3db9

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.

Real palettes that use #2d3db9

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b9a82d

#2d83b9 · #622db9

#b92d3d · #3db92d

Split-complementary

Open in tool →

#b9622d · #83b92d

#b92d83 · #b9a82d · #2db962

Contrast

#2d3db9 as textRatioAAAA largeAAAFix
Aaon white
8.47:1passpasspassPasses AAA — no fix needed.
Aaon black
2.48:1failfailfail
  • AA: use #5f6dd8 as the text (4.67:1)
  • AAA: use #8892e2 as the text (7.26:1)
  • AA: or shift the background to #bdbdbd (4.51:1)
  • AAA: or shift the background to #ebebeb (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2d3db9 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

#2d3db9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2d3db9
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 #2d3db9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2d3db9-9c9cc4-df884e-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