Color

#3374db

#3374db
hex#3374db
rgbrgb(51, 116, 219)
hslhsl(217, 70%, 53%)
oklchoklch(0.573 0.171 259.4)
Closest name: royalblue (#4169e1)Relative luminance 0.1831

Tints & shades

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

Harmonies

Complementary

Open in tool →

#db9b33

#33c7db · #4733db

#db3374 · #74db33

Split-complementary

Open in tool →

#db4733 · #c7db33

#db33c7 · #db9b33 · #33db47

Contrast

#3374db as textRatioAAAA largeAAAFix
Aaon white
4.5:1passpassfail
  • AAA: use #1f55ad as the text (7.09:1)
Aaon black
4.66:1passpassfail
  • AAA: use #6797e4 as the text (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3374db 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

#3374db reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3374db
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 #3374db and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3374db-9ca7c4-df624e-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