Color

#003feb

#003feb
hex#003feb
rgbrgb(0, 63, 235)
hslhsl(224, 100%, 46%)
oklchoklch(0.478 0.259 263.6)
Closest name: C64 Blue (#003aff)Relative luminance 0.0955

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ebac00

#00b4eb · #3700eb

#eb003f · #3feb00

Split-complementary

Open in tool →

#eb3700 · #b4eb00

#eb00b4 · #ebac00 · #00eb37

Contrast

#003feb as textRatioAAAA largeAAAFix
Aaon white
7.21:1passpasspassPasses AAA — no fix needed.
Aaon black
2.91:1failfailfail
  • AA: use #3369ff as the text (4.61:1)
  • AAA: use #6b93ff as the text (7.24:1)
  • AA: or shift the background to #cfcfcf (4.63:1)
  • AAA: or shift the background to #fcfcfc (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #003feb 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

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

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

tool url/palettes/new/003feb-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