Color

#3a9de9

#3a9de9
hex#3a9de9
rgbrgb(58, 157, 233)
hslhsl(206, 80%, 57%)
oklchoklch(0.674 0.145 245.8)
Closest name: Fresh Blue of Bel Air (#069af3)Relative luminance 0.309

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e9863a

#3ae9dd · #3a45e9

#e93a9d · #9de93a

Split-complementary

Open in tool →

#e93a45 · #e9dd3a

#dd3ae9 · #e9863a · #45e93a

Contrast

#3a9de9 as textRatioAAAA largeAAAFix
Aaon white
2.93:1failfailfail
  • AA: use #1679c5 as the text (4.59:1)
  • AAA: use #105a93 as the text (7.23:1)
  • AA: or shift the background to #303030 (4.51:1)
  • AAA: or shift the background to #030303 (7.05:1)
Aaon black
7.18:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3a9de9 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

#3a9de9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a9de9
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 #3a9de9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a9de9-9caec4-df4e56-1f212d-e9f1f1?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