Color

#1d51ed

#1d51ed
hex#1d51ed
rgbrgb(29, 81, 237)
hslhsl(225, 85%, 52%)
oklchoklch(0.513 0.24 264.5)
Closest name: C64 Blue (#003aff)Relative luminance 0.1226

Tints & shades

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

Harmonies

Complementary

Open in tool →

#edb91d

#1db9ed · #511ded

#ed1d51 · #51ed1d

Split-complementary

Open in tool →

#ed511d · #b9ed1d

#ed1db9 · #edb91d · #1ded51

Contrast

#1d51ed as textRatioAAAA largeAAAFix
Aaon white
6.08:1passpassfail
Aaon black
3.45:1failpassfail
  • AA: use #3e6aef as the text (4.51:1)
  • AAA: use #7192f4 as the text (7.12:1)
  • AA: or shift the background to #dedede (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 #1d51ed as the background.

Brands using this color

Fonts for this mood

#1d51ed reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1d51ed
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 #1d51ed and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1d51ed-9ca1c4-df754e-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