Color

#2b5cda

#2b5cda
hex#2b5cda
rgbrgb(43, 92, 218)
hslhsl(223, 70%, 51%)
oklchoklch(0.52 0.2 264.3)
Closest name: Royal Blue (#4169e1)Relative luminance 0.1323

Colors that go with #2b5cda

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 →

#daa82b

#2bb4da · #502bda

#da2b5c · #5cda2b

Split-complementary

Open in tool →

#da502b · #b4da2b

#da2bb4 · #daa82b · #2bda50

Contrast

#2b5cda as textRatioAAAA largeAAAFix
Aaon white
5.76:1passpassfail
  • AAA: use #224ebf as the text (7.22:1)
Aaon black
3.65:1failpassfail
  • AA: use #4570de as the text (4.63:1)
  • AAA: use #7495e7 as the text (7.2:1)
  • AA: or shift the background to #e6e6e6 (4.61:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2b5cda as the background.

Brands using this color

Fonts for this mood

#2b5cda reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b5cda
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 #2b5cda and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b5cda-9ca3c4-df704e-211f2d-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