Color

#3a63bb

#3a63bb
hex#3a63bb
rgbrgb(58, 99, 187)
hslhsl(221, 53%, 48%)
oklchoklch(0.517 0.146 263.4)
Closest name: God of Rain (#4466cc)Relative luminance 0.1341

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bb923a

#3aa3bb · #513abb

#bb3a63 · #63bb3a

Split-complementary

Open in tool →

#bb513a · #a3bb3a

#bb3aa3 · #bb923a · #3abb51

Contrast

#3a63bb as textRatioAAAA largeAAAFix
Aaon white
5.7:1passpassfail
  • AAA: use #3154a0 as the text (7.23:1)
Aaon black
3.68:1failpassfail
  • AA: use #4c73c8 as the text (4.59:1)
  • AAA: use #7a97d6 as the text (7.23:1)
  • AA: or shift the background to #e6e6e6 (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 #3a63bb as the background.

Brands using this color

Fonts for this mood

#3a63bb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a63bb
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 #3a63bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a63bb-9ca4c4-df6b4e-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