Color

#183fec

#183fec
hex#183fec
rgbrgb(24, 63, 236)
hslhsl(229, 85%, 51%)
oklchoklch(0.483 0.258 265.4)
Closest name: C64 Blue (#003aff)Relative luminance 0.0981

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ecc518

#18a9ec · #5b18ec

#ec183f · #3fec18

Split-complementary

Open in tool →

#ec5b18 · #a9ec18

#ec18a9 · #ecc518 · #18ec5b

Contrast

#183fec as textRatioAAAA largeAAAFix
Aaon white
7.09:1passpasspassPasses AAA — no fix needed.
Aaon black
2.96:1failfailfail
  • AA: use #4c6af0 as the text (4.63:1)
  • AAA: use #7b91f4 as the text (7.2:1)
  • AA: or shift the background to #cfcfcf (4.55:1)
  • AAA: or shift the background to #ffffff (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #183fec 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

#183fec reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #183fec
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 #183fec and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/183fec-9c9fc4-df7e4e-231f2d-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