Color

#557de2

#557de2
hex#557de2
rgbrgb(85, 125, 226)
hslhsl(223, 71%, 61%)
oklchoklch(0.61 0.159 265.7)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2209

Colors that go with #557de2

Charcoal, Copper 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 →

#e2ba55

#55c4e2 · #7455e2

#e2557d · #7de255

Split-complementary

Open in tool →

#e27455 · #c4e255

#e255c4 · #e2ba55 · #55e274

Contrast

#557de2 as textRatioAAAA largeAAAFix
Aaon white
3.88:1failpassfail
  • AA: use #4370df as the text (4.54:1)
  • AAA: use #214fc4 as the text (7.05:1)
  • AA: or shift the background to #171717 (4.63:1)
Aaon black
5.42:1passpassfail
  • AAA: use #7394e7 as the text (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #557de2 as the background.

Brands using this color

Fonts for this mood

#557de2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #557de2
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 #557de2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/557de2-9ca3c4-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