Color

#1283ca

#1283ca
hex#1283ca
rgbrgb(18, 131, 202)
hslhsl(203, 84%, 43%)
oklchoklch(0.588 0.141 244.5)
Closest name: Haddock’s Sweater (#277aba)Relative luminance 0.2063

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ca5812

#12cab4 · #1227ca

#ca1283 · #83ca12

Split-complementary

Open in tool →

#ca1227 · #cab412

#b412ca · #ca5812 · #27ca12

Contrast

#1283ca as textRatioAAAA largeAAAFix
Aaon white
4.1:1failpassfail
  • AA: use #107abc as the text (4.63:1)
  • AAA: use #0c5b8d as the text (7.25:1)
  • AA: or shift the background to #121212 (4.57:1)
Aaon black
5.13:1passpassfail
  • AAA: use #1e9deb as the text (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1283ca as the background.

Brands using this color

Fonts for this mood

#1283ca reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1283ca
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 #1283ca and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1283ca-9cb0c4-df4e5d-1f222d-e9f1f0?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