Color

#2b4eda

#2b4eda
hex#2b4eda
rgbrgb(43, 78, 218)
hslhsl(228, 70%, 51%)
oklchoklch(0.494 0.217 266.8)
Closest name: Denim (#1560bd)Relative luminance 0.1102

Colors that go with #2b4eda

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.

Real palettes that use #2b4eda

Tints & shades

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

Harmonies

Complementary

Open in tool →

#dab72b

#2ba5da · #5f2bda

#da2b4e · #4eda2b

Split-complementary

Open in tool →

#da5f2b · #a5da2b

#da2ba5 · #dab72b · #2bda5f

Contrast

#2b4eda as textRatioAAAA largeAAAFix
Aaon white
6.55:1passpassfail
  • AAA: use #2548d4 as the text (7.1:1)
Aaon black
3.2:1failpassfail
  • AA: use #526ee0 as the text (4.67:1)
  • AAA: use #7d92e8 as the text (7.15:1)
  • AA: or shift the background to #d6d6d6 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2b4eda as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#2b4eda reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b4eda
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 #2b4eda and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b4eda-9c9fc4-df7c4e-231f2d-e9eff1?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