Color

#3994ef

#3994ef
hex#3994ef
rgbrgb(57, 148, 239)
hslhsl(210, 85%, 58%)
oklchoklch(0.657 0.16 251.7)
Closest name: Fresh Blue of Bel Air (#069af3)Relative luminance 0.2828

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ef9439

#39efef · #3939ef

#ef3994 · #94ef39

Split-complementary

Open in tool →

#ef3939 · #efef39

#ef39ef · #ef9439 · #39ef39

Contrast

#3994ef as textRatioAAAA largeAAAFix
Aaon white
3.15:1failpassfail
  • AA: use #1275d9 as the text (4.59:1)
  • AAA: use #0d59a5 as the text (7.02:1)
  • AA: or shift the background to #292929 (4.61:1)
Aaon black
6.66:1passpassfail
  • AAA: use #4299f0 as the text (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3994ef 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

#3994ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3994ef
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 #3994ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3994ef-9cabc4-df514e-1f202d-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