Color

#1317fb

#1317fb
hex#1317fb
rgbrgb(19, 23, 251)
hslhsl(239, 97%, 53%)
oklchoklch(0.459 0.301 265.5)
Closest name: blue (#0000ff)Relative luminance 0.0772

Colors that go with #1317fb

Charcoal, Crimson and Cobalt Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbf813

#138bfb · #8313fb

#fb1317 · #17fb13

Split-complementary

Open in tool →

#fb8313 · #8bfb13

#fb138b · #fbf813 · #13fb83

Contrast

#1317fb as textRatioAAAA largeAAAFix
Aaon white
8.26:1passpasspassPasses AAA — no fix needed.
Aaon black
2.54:1failfailfail
  • AA: use #5e61fd as the text (4.6:1)
  • AAA: use #8b8dfd as the text (7.33:1)
  • AA: or shift the background to #c2c2c2 (4.64:1)
  • AAA: or shift the background to #ededed (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1317fb as the background.

Brands using this color

Fonts for this mood

#1317fb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1317fb
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #1317fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1317fb-a09cc4-df964e-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