Color

#317fdd

#317fdd
hex#317fdd
rgbrgb(49, 127, 221)
hslhsl(213, 72%, 53%)
oklchoklch(0.597 0.162 255.3)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2105

Tints & shades

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

Harmonies

Complementary

Open in tool →

#dd9031

#31d5dd · #3931dd

#dd317f · #7fdd31

Split-complementary

Open in tool →

#dd3931 · #d5dd31

#dd31d5 · #dd9031 · #31dd39

Contrast

#317fdd as textRatioAAAA largeAAAFix
Aaon white
4.03:1failpassfail
  • AA: use #2374d7 as the text (4.61:1)
  • AAA: use #1a58a2 as the text (7.09:1)
  • AA: or shift the background to #141414 (4.57:1)
Aaon black
5.21:1passpassfail
  • AAA: use #5d9ae5 as the text (7.22:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #317fdd as the background.

Brands using this color

Fonts for this mood

#317fdd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #317fdd
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 #317fdd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/317fdd-9ca9c4-df584e-1f202d-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