Color

#2137fd

#2137fd
hex#2137fd
rgbrgb(33, 55, 253)
hslhsl(234, 98%, 56%)
oklchoklch(0.493 0.282 266.8)
Closest name: C64 Blue (#003aff)Relative luminance 0.1015

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fde721

#21a5fd · #7921fd

#fd2137 · #37fd21

Split-complementary

Open in tool →

#fd7921 · #a5fd21

#fd21a5 · #fde721 · #21fd79

Contrast

#2137fd as textRatioAAAA largeAAAFix
Aaon white
6.93:1passpassfail
  • AAA: use #1c32fd as the text (7.18:1)
Aaon black
3.03:1failpassfail
  • AA: use #5364fd as the text (4.61:1)
  • AAA: use #818dfe as the text (7.17:1)
  • AA: or shift the background to #d1d1d1 (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2137fd as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#2137fd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2137fd
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 #2137fd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2137fd-9d9cc4-df8a4e-241f2d-e9eef1?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