Color

#3a58bb

#3a58bb
hex#3a58bb
rgbrgb(58, 88, 187)
hslhsl(226, 53%, 48%)
oklchoklch(0.494 0.16 267.5)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1147

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bb9d3a

#3a99bb · #5c3abb

#bb3a58 · #58bb3a

Split-complementary

Open in tool →

#bb5c3a · #99bb3a

#bb3a99 · #bb9d3a · #3abb5c

Contrast

#3a58bb as textRatioAAAA largeAAAFix
Aaon white
6.38:1passpassfail
  • AAA: use #3652b0 as the text (7.02:1)
Aaon black
3.29:1failpassfail
  • AA: use #5772cb as the text (4.67:1)
  • AAA: use #7e93d7 as the text (7.04:1)
  • AA: or shift the background to #d9d9d9 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3a58bb as the background.

Brands using this color

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

Fonts for this mood

#3a58bb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a58bb
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 #3a58bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a58bb-9ca1c4-df774e-221f2d-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