Color

#3165dd

#3165dd
hex#3165dd
rgbrgb(49, 101, 221)
hslhsl(222, 72%, 53%)
oklchoklch(0.542 0.192 263.6)
Closest name: royalblue (#4169e1)Relative luminance 0.1518

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ddaa31

#31bbdd · #5331dd

#dd3165 · #65dd31

Split-complementary

Open in tool →

#dd5331 · #bbdd31

#dd31bb · #ddaa31 · #31dd53

Contrast

#3165dd as textRatioAAAA largeAAAFix
Aaon white
5.2:1passpassfail
  • AAA: use #1f50c1 as the text (7.06:1)
Aaon black
4.04:1failpassfail
  • AA: use #3e6ee0 as the text (4.51:1)
  • AAA: use #7396e8 as the text (7.26:1)
  • AA: or shift the background to #f0f0f0 (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3165dd as the background.

Brands using this color

Fonts for this mood

#3165dd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3165dd
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 #3165dd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3165dd-9ca3c4-df6e4e-211f2d-e9eff1?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