Color

#1f4fff

#1f4fff
hex#1f4fff
rgbrgb(31, 79, 255)
hslhsl(227, 100%, 56%)
oklchoklch(0.528 0.263 265.2)
Closest name: C64 Blue (#003aff)Relative luminance 0.131

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ffce1f

#1fbfff · #5e1fff

#ff1f4f · #4fff1f

Split-complementary

Open in tool →

#ff5e1f · #bfff1f

#ff1fbf · #ffce1f · #1fff5e

Contrast

#1f4fff as textRatioAAAA largeAAAFix
Aaon white
5.8:1passpassfail
  • AAA: use #0037ff as the text (7.02:1)
Aaon black
3.62:1failpassfail
  • AA: use #3d67ff as the text (4.58:1)
  • AAA: use #708fff as the text (7.06:1)
  • AA: or shift the background to #e3e3e3 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1f4fff as the background.

Brands using this color

Fonts for this mood

#1f4fff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1f4fff
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 #1f4fff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1f4fff-9ca0c4-df7a4e-221f2d-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