Color

#2851d7

#2851d7
hex#2851d7
rgbrgb(40, 81, 215)
hslhsl(226, 69%, 50%)
oklchoklch(0.496 0.21 265.7)
Closest name: Denim (#1560bd)Relative luminance 0.1124

Colors that go with #2851d7

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 #2851d7

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d7ae28

#28a9d7 · #5628d7

#d72851 · #51d728

Split-complementary

Open in tool →

#d75628 · #a9d728

#d728a9 · #d7ae28 · #28d756

Contrast

#2851d7 as textRatioAAAA largeAAAFix
Aaon white
6.46:1passpassfail
  • AAA: use #254ccb as the text (7.06:1)
Aaon black
3.25:1failpassfail
  • AA: use #4e70df as the text (4.71:1)
  • AAA: use #7993e6 as the text (7.13:1)
  • AA: or shift the background to #d9d9d9 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2851d7 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#2851d7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2851d7
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 #2851d7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2851d7-9ca1c4-df774e-221f2d-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