Color

#0000f0

#0000f0
hex#0000f0
rgbrgb(0, 0, 240)
hslhsl(240, 100%, 47%)
oklchoklch(0.432 0.299 264.1)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0629

Tints & shades

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

Harmonies

Complementary

Open in tool →

#f0f000

#0078f0 · #7800f0

#f00000 · #00f000

Split-complementary

Open in tool →

#f07800 · #78f000

#f00078 · #f0f000 · #00f078

Contrast

#0000f0 as textRatioAAAA largeAAAFix
Aaon white
9.3:1passpasspassPasses AAA — no fix needed.
Aaon black
2.26:1failfailfail
  • AA: use #6161ff as the text (4.66:1)
  • AAA: use #8a8aff as the text (7.16:1)
  • AA: or shift the background to #b5b5b5 (4.54:1)
  • AAA: or shift the background to #e0e0e0 (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0000f0 as the background.

Brands using this color

Fonts for this mood

#0000f0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0000f0
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 #0000f0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0000f0-a19cc4-df994e-251f2d-e9edf1?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