Color

#1900ff

#1900ff
hex#1900ff
rgbrgb(25, 0, 255)
hslhsl(246, 100%, 50%)
oklchoklch(0.456 0.31 266.1)
Closest name: blue (#0000ff)Relative luminance 0.0743

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e5ff00

#0066ff · #9900ff

#ff1900 · #00ff1a

Split-complementary

Open in tool →

#ff9900 · #66ff00

#ff0066 · #e5ff00 · #00ff99

Contrast

#1900ff as textRatioAAAA largeAAAFix
Aaon white
8.45:1passpasspassPasses AAA — no fix needed.
Aaon black
2.49:1failfailfail
  • AA: use #6c5cff as the text (4.61:1)
  • AAA: use #9185ff as the text (7:1)
  • AA: or shift the background to #bfbfbf (4.59:1)
  • AAA: or shift the background to #ebebeb (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1900ff as the background.

Brands using this color

Fonts for this mood

#1900ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1900ff
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 #1900ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1900ff-a59cc4-dfa74e-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