Color

#283fbd

#283fbd
hex#283fbd
rgbrgb(40, 63, 189)
hslhsl(231, 65%, 45%)
oklchoklch(0.44 0.198 268.3)
Closest name: Denim (#2243b6)Relative luminance 0.0768

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bda728

#2889bd · #5c28bd

#bd283f · #3fbd28

Split-complementary

Open in tool →

#bd5c28 · #89bd28

#bd2889 · #bda728 · #28bd5c

Contrast

#283fbd as textRatioAAAA largeAAAFix
Aaon white
8.28:1passpasspassPasses AAA — no fix needed.
Aaon black
2.54:1failfailfail
  • AA: use #576bdb as the text (4.53:1)
  • AAA: use #8190e4 as the text (7.04:1)
  • AA: or shift the background to #bfbfbf (4.5:1)
  • AAA: or shift the background to #ededed (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283fbd 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

#283fbd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283fbd
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 #283fbd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283fbd-9c9ec4-df834e-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