Color

#2b00eb

#2b00eb
hex#2b00eb
rgbrgb(43, 0, 235)
hslhsl(251, 100%, 46%)
oklchoklch(0.437 0.287 269.9)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0651

Tints & shades

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

Harmonies

Complementary

Open in tool →

#c0eb00

#004aeb · #a000eb

#eb2b00 · #00eb2b

Split-complementary

Open in tool →

#eba000 · #4aeb00

#eb004a · #c0eb00 · #00eba0

Contrast

#2b00eb as textRatioAAAA largeAAAFix
Aaon white
9.12:1passpasspassPasses AAA — no fix needed.
Aaon black
2.3:1failfailfail
  • AA: use #7657ff as the text (4.58:1)
  • AAA: use #9b85ff as the text (7.19:1)
  • AA: or shift the background to #b8b8b8 (4.6:1)
  • AAA: or shift the background to #e3e3e3 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2b00eb 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

#2b00eb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b00eb
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 #2b00eb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b00eb-a89cc4-dfb34e-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