Color

#003fc7

#003fc7
hex#003fc7
rgbrgb(0, 63, 199)
hslhsl(221, 100%, 39%)
oklchoklch(0.44 0.217 262.8)
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 →

#c78800

#00a2c7 · #2400c7

#c7003f · #3fc700

Split-complementary

Open in tool →

#c72400 · #a2c700

#c700a2 · #c78800 · #00c724

Contrast

#003fc7 as textRatioAAAA largeAAAFix
Aaon white
8.28:1passpasspassPasses AAA — no fix needed.
Aaon black
2.54:1failfailfail
  • AA: use #2469ff as the text (4.54:1)
  • AAA: use #6193ff as the text (7.13:1)
  • 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 #003fc7 as the background.

Brands using this color

Fonts for this mood

#003fc7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #003fc7
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 #003fc7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/003fc7-9ca4c4-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