Color

#2a4bdf

#2a4bdf
hex#2a4bdf
rgbrgb(42, 75, 223)
hslhsl(229, 74%, 52%)
oklchoklch(0.494 0.226 267)
Closest name: C64 Blue (#003aff)Relative luminance 0.1085

Colors that go with #2a4bdf

Charcoal, Sea Green and Amber 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 →

#dfbe2a

#2aa6df · #632adf

#df2a4b · #4bdf2a

Split-complementary

Open in tool →

#df632a · #a6df2a

#df2aa6 · #dfbe2a · #2adf63

Contrast

#2a4bdf as textRatioAAAA largeAAAFix
Aaon white
6.62:1passpassfail
  • AAA: use #2144de as the text (7.13:1)
Aaon black
3.17:1failpassfail
  • AA: use #526de5 as the text (4.68:1)
  • AAA: use #7e92ec as the text (7.21:1)
  • AA: or shift the background to #d6d6d6 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2a4bdf as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#2a4bdf reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2a4bdf
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 #2a4bdf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2a4bdf-9c9fc4-df7e4e-231f2d-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