Color

#308fbb

#308fbb
hex#308fbb
rgbrgb(48, 143, 187)
hslhsl(199, 59%, 46%)
oklchoklch(0.615 0.109 232.9)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2386

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bb5c30

#30bba1 · #3049bb

#bb308f · #8fbb30

Split-complementary

Open in tool →

#bb3049 · #bba130

#a130bb · #bb5c30 · #49bb30

Contrast

#308fbb as textRatioAAAA largeAAAFix
Aaon white
3.64:1failpassfail
  • AA: use #2a7ca2 as the text (4.66:1)
  • AAA: use #1f5d7a as the text (7.23:1)
  • AA: or shift the background to #1f1f1f (4.53:1)
Aaon black
5.77:1passpassfail
  • AAA: use #3c9fcd as the text (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #308fbb 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

#308fbb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #308fbb
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 #308fbb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/308fbb-9cb3c4-df4e66-1f232d-e9f1f0?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