Color

#2b00ff

#2b00ff
hex#2b00ff
rgbrgb(43, 0, 255)
hslhsl(250, 100%, 50%)
oklchoklch(0.463 0.306 269)
Closest name: Bluebonnet (#1c1cf0)Relative luminance 0.0773

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d4ff00

#0055ff · #aa00ff

#ff2a00 · #00ff2a

Split-complementary

Open in tool →

#ffaa00 · #55ff00

#ff0055 · #d4ff00 · #00ffaa

Contrast

#2b00ff as textRatioAAAA largeAAAFix
Aaon white
8.25:1passpasspassPasses AAA — no fix needed.
Aaon black
2.55:1failfailfail
  • AA: use #7357ff as the text (4.54:1)
  • AAA: use #9985ff as the text (7.15:1)
  • AA: or shift the background to #c2c2c2 (4.63:1)
  • AAA: or shift the background to #ededed (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 #2b00ff as the background.

Brands using this color

Fonts for this mood

#2b00ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b00ff
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 #2b00ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b00ff-a79cc4-dfb14e-281f2d-e9ecf1?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