Color

#043acd

#043acd
hex#043acd
rgbrgb(4, 58, 205)
hslhsl(224, 96%, 41%)
oklchoklch(0.438 0.229 263.7)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0746

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cd9704

#049ecd · #3304cd

#cd043a · #3acd04

Split-complementary

Open in tool →

#cd3304 · #9ecd04

#cd049e · #cd9704 · #04cd33

Contrast

#043acd as textRatioAAAA largeAAAFix
Aaon white
8.43:1passpasspassPasses AAA — no fix needed.
Aaon black
2.49:1failfailfail
  • AA: use #3268fb as the text (4.51:1)
  • AAA: use #6e94fc as the text (7.3:1)
  • AA: or shift the background to #bfbfbf (4.58:1)
  • AAA: or shift the background to #ebebeb (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 #043acd as the background.

Brands using this color

Fonts for this mood

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

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

tool url/palettes/new/043acd-9ca2c4-df724e-221f2d-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