Color

#308cb0

#308cb0
hex#308cb0
rgbrgb(48, 140, 176)
hslhsl(197, 57%, 44%)
oklchoklch(0.602 0.1 228.3)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2252

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b05430

#30b094 · #304cb0

#b0308c · #8cb030

Split-complementary

Open in tool →

#b0304c · #b09430

#9430b0 · #b05430 · #4cb030

Contrast

#308cb0 as textRatioAAAA largeAAAFix
Aaon white
3.82:1failpassfail
  • AA: use #2c7fa0 as the text (4.52:1)
  • AAA: use #215f78 as the text (7.06:1)
  • AA: or shift the background to #1a1a1a (4.56:1)
Aaon black
5.5:1passpassfail
  • AAA: use #3ba1c9 as the text (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #308cb0 as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#308cb0 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #308cb0
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 #308cb0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/308cb0-9cb4c4-df4e6b-1f232d-e9f1ef?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