Color

#3974db

#3974db
hex#3974db
rgbrgb(57, 116, 219)
hslhsl(218, 69%, 54%)
oklchoklch(0.575 0.17 260.7)
Closest name: royalblue (#4169e1)Relative luminance 0.1848

Tints & shades

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

Harmonies

Complementary

Open in tool →

#db9f39

#39c5db · #4e39db

#db3974 · #74db39

Split-complementary

Open in tool →

#db4e39 · #c5db39

#db39c5 · #db9f39 · #39db4e

Contrast

#3974db as textRatioAAAA largeAAAFix
Aaon white
4.47:1failpassfail
  • AA: use #3471da as the text (4.65:1)
  • AAA: use #2055b1 as the text (7.01:1)
  • AA: or shift the background to #050505 (4.56:1)
Aaon black
4.7:1passpassfail
  • AAA: use #6c98e4 as the text (7.25:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3974db 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

#3974db reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3974db
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 #3974db and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3974db-9ca6c4-df644e-201f2d-e9f0f1?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