Color

#57a5ff

#57a5ff
hex#57a5ff
rgbrgb(87, 165, 255)
hslhsl(212, 100%, 67%)
oklchoklch(0.713 0.153 253.6)
Closest name: Cerulean (#55aaee)Relative luminance 0.3616

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ffb057

#57f9ff · #5c57ff

#ff57a5 · #a5ff57

Split-complementary

Open in tool →

#ff5c57 · #f9ff57

#ff57f9 · #ffb057 · #57ff5c

Contrast

#57a5ff as textRatioAAAA largeAAAFix
Aaon white
2.55:1failfailfail
  • AA: use #0070f0 as the text (4.59:1)
  • AAA: use #0053b3 as the text (7.27:1)
  • AA: or shift the background to #383838 (4.6:1)
  • AAA: or shift the background to #171717 (7.03:1)
Aaon black
8.23:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #57a5ff as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

Fonts for this mood

#57a5ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #57a5ff
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 #57a5ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/57a5ff-9caac4-df564e-1f202d-e9f1f1?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