Color

#2100db

#2100db
hex#2100db
rgbrgb(33, 0, 219)
hslhsl(249, 100%, 43%)
oklchoklch(0.411 0.273 268.5)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0544

Tints & shades

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

Harmonies

Complementary

Open in tool →

#badb00

#004ddb · #8f00db

#db2100 · #00db21

Split-complementary

Open in tool →

#db8f00 · #4ddb00

#db004d · #badb00 · #00db8f

Contrast

#2100db as textRatioAAAA largeAAAFix
Aaon white
10.06:1passpasspassPasses AAA — no fix needed.
Aaon black
2.09:1failfailfail
  • AA: use #745cff as the text (4.72:1)
  • AAA: use #9785ff as the text (7.11:1)
  • AA: or shift the background to #b0b0b0 (4.64:1)
  • AAA: or shift the background to #d9d9d9 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2100db 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

#2100db reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2100db
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 #2100db and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2100db-a79cc4-dfae4e-271f2d-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