Color

#316ddd

#316ddd
hex#316ddd
rgbrgb(49, 109, 221)
hslhsl(219, 72%, 53%)
oklchoklch(0.559 0.183 261.5)
Closest name: royalblue (#4169e1)Relative luminance 0.1681

Tints & shades

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

Harmonies

Complementary

Open in tool →

#dda131

#31c4dd · #4b31dd

#dd316d · #6ddd31

Split-complementary

Open in tool →

#dd4b31 · #c4dd31

#dd31c4 · #dda131 · #31dd4b

Contrast

#316ddd as textRatioAAAA largeAAAFix
Aaon white
4.81:1passpassfail
  • AAA: use #1d52b4 as the text (7.2:1)
Aaon black
4.36:1failpassfail
  • AA: use #3570de as the text (4.52:1)
  • AAA: use #6a96e7 as the text (7.13:1)
  • AA: or shift the background to #fafafa (4.61:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #316ddd 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

#316ddd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #316ddd
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 #316ddd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/316ddd-9ca5c4-df664e-211f2d-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