Color

#043fbe

#043fbe
hex#043fbe
rgbrgb(4, 63, 190)
hslhsl(221, 96%, 38%)
oklchoklch(0.431 0.205 262.8)
Closest name: Denim (#2243b6)Relative luminance 0.073

Tints & shades

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

Harmonies

Complementary

Open in tool →

#be8304

#049cbe · #2604be

#be043f · #3fbe04

Split-complementary

Open in tool →

#be2604 · #9cbe04

#be049c · #be8304 · #04be26

Contrast

#043fbe as textRatioAAAA largeAAAFix
Aaon white
8.54:1passpasspassPasses AAA — no fix needed.
Aaon black
2.46:1failfailfail
  • AA: use #286bfb as the text (4.59:1)
  • AAA: use #6494fc as the text (7.18:1)
  • AA: or shift the background to #bdbdbd (4.54:1)
  • AAA: or shift the background to #ebebeb (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #043fbe 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

#043fbe reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #043fbe
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 #043fbe and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/043fbe-9ca4c4-df6b4e-211f2d-e9eff1?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