Color

#2130fd

#2130fd
hex#2130fd
rgbrgb(33, 48, 253)
hslhsl(236, 98%, 56%)
oklchoklch(0.485 0.287 267)
Closest name: C64 Blue (#003aff)Relative luminance 0.0953

Colors that go with #2130fd

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 →

#fdee21

#219dfd · #8021fd

#fd2130 · #30fd21

Split-complementary

Open in tool →

#fd8021 · #9dfd21

#fd219d · #fdee21 · #21fd80

Contrast

#2130fd as textRatioAAAA largeAAAFix
Aaon white
7.23:1passpasspassPasses AAA — no fix needed.
Aaon black
2.91:1failfailfail
  • AA: use #5863fd as the text (4.62:1)
  • AAA: use #868efe as the text (7.31:1)
  • AA: or shift the background to #cccccc (4.5:1)
  • AAA: or shift the background to #fcfcfc (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2130fd as the background.

Brands using this color

Fonts for this mood

#2130fd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2130fd
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 #2130fd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2130fd-9e9cc4-df8f4e-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