Color

#2a57cb

#2a57cb
hex#2a57cb
rgbrgb(42, 87, 203)
hslhsl(223, 66%, 48%)
oklchoklch(0.498 0.187 264.4)
Closest name: God of Rain (#4466cc)Relative luminance 0.1162

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cb9d2a

#2aa8cb · #4d2acb

#cb2a57 · #57cb2a

Split-complementary

Open in tool →

#cb4d2a · #a8cb2a

#cb2aa8 · #cb9d2a · #2acb4d

Contrast

#2a57cb as textRatioAAAA largeAAAFix
Aaon white
6.32:1passpassfail
  • AAA: use #2650ba as the text (7.15:1)
Aaon black
3.32:1failpassfail
  • AA: use #456fd9 as the text (4.53:1)
  • AAA: use #7393e2 as the text (7:1)
  • AA: or shift the background to #dbdbdb (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2a57cb as the background.

Brands using this color

Fonts for this mood

#2a57cb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2a57cb
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 #2a57cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2a57cb-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