Color

#0557fa

#0557fa
hex#0557fa
rgbrgb(5, 87, 250)
hslhsl(220, 96%, 50%)
oklchoklch(0.532 0.251 262.5)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1375

Tints & shades

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

Harmonies

Complementary

Open in tool →

#faa805

#05d1fa · #2e05fa

#fa0557 · #57fa05

Split-complementary

Open in tool →

#fa2e05 · #d1fa05

#fa05d1 · #faa805 · #05fa2e

Contrast

#0557fa as textRatioAAAA largeAAAFix
Aaon white
5.6:1passpassfail
  • AAA: use #044bd7 as the text (7.02:1)
Aaon black
3.75:1failpassfail
  • AA: use #236bfb as the text (4.57:1)
  • AAA: use #5f93fc as the text (7.07:1)
  • AA: or shift the background to #e8e8e8 (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0557fa as the background.

Brands using this color

Fonts for this mood

#0557fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0557fa
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #0557fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0557fa-9ca5c4-df694e-211f2d-e9f0f1?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