Color

#1313fb

#1313fb
hex#1313fb
rgbrgb(19, 19, 251)
hslhsl(240, 97%, 53%)
oklchoklch(0.457 0.303 265.5)
Closest name: blue (#0000ff)Relative luminance 0.0757

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbfb13

#1387fb · #8713fb

#fb1313 · #13fb13

Split-complementary

Open in tool →

#fb8713 · #87fb13

#fb1387 · #fbfb13 · #13fb87

Contrast

#1313fb as textRatioAAAA largeAAAFix
Aaon white
8.35:1passpasspassPasses AAA — no fix needed.
Aaon black
2.51:1failfailfail
  • AA: use #6363fd as the text (4.73:1)
  • AAA: use #8b8bfd as the text (7.21:1)
  • AA: or shift the background to #bfbfbf (4.54:1)
  • AAA: or shift the background to #ebebeb (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1313fb as the background.

Brands using this color

Fonts for this mood

#1313fb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1313fb
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 #1313fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1313fb-a19cc4-df994e-251f2d-e9edf1?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