Color

#308dcf

#308dcf
hex#308dcf
rgbrgb(48, 141, 207)
hslhsl(205, 62%, 50%)
oklchoklch(0.62 0.131 244.1)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2418

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cf7230

#30cfc1 · #303ecf

#cf308d · #8dcf30

Split-complementary

Open in tool →

#cf303e · #cfc130

#c130cf · #cf7230 · #3ecf30

Contrast

#308dcf as textRatioAAAA largeAAAFix
Aaon white
3.6:1failpassfail
  • AA: use #2b7cb6 as the text (4.51:1)
  • AAA: use #205d88 as the text (7.04:1)
  • AA: or shift the background to #1f1f1f (4.58:1)
Aaon black
5.84:1passpassfail
  • AAA: use #4d9dd5 as the text (7.1:1)

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

#308dcf reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

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

tool url/palettes/new/308dcf-9cafc4-df4e58-1f212d-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