Color

#305ebb

#305ebb
hex#305ebb
rgbrgb(48, 94, 187)
hslhsl(220, 59%, 46%)
oklchoklch(0.502 0.155 262.5)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1222

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bb8c30

#30a3bb · #4730bb

#bb305e · #5ebb30

Split-complementary

Open in tool →

#bb4730 · #a3bb30

#bb30a3 · #bb8c30 · #30bb47

Contrast

#305ebb as textRatioAAAA largeAAAFix
Aaon white
6.1:1passpassfail
  • AAA: use #2b54a6 as the text (7.19:1)
Aaon black
3.44:1failpassfail
  • AA: use #4473cf as the text (4.6:1)
  • AAA: use #7597db as the text (7.21:1)
  • AA: or shift the background to #dedede (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #305ebb as the background.

Brands using this color

Fonts for this mood

#305ebb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #305ebb
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 #305ebb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/305ebb-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