Color

#308db5

#308db5
hex#308db5
rgbrgb(48, 141, 181)
hslhsl(198, 58%, 45%)
oklchoklch(0.607 0.104 230.8)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2301

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b55830

#30b59b · #304bb5

#b5308d · #8db530

Split-complementary

Open in tool →

#b5304b · #b59b30

#9b30b5 · #b55830 · #4bb530

Contrast

#308db5 as textRatioAAAA largeAAAFix
Aaon white
3.75:1failpassfail
  • AA: use #2b7ea1 as the text (4.56:1)
  • AAA: use #205e79 as the text (7.15:1)
  • AA: or shift the background to #1c1c1c (4.55:1)
Aaon black
5.6:1passpassfail

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #308db5 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

#308db5 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #308db5
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 #308db5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/308db5-9cb3c4-df4e69-1f232d-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