Color

Deno Primary

#6639ba
hex#6639ba
rgbrgb(102, 57, 186)
hslhsl(261, 53%, 48%)
oklchoklch(0.474 0.191 293.8)
From Deno brand colorsRelative luminance 0.093

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8ebb3a

#3a4dbb · #a83abb

#bb673a · #3abb67

Split-complementary

Open in tool →

#bba83a · #4dbb3a

#bb3a4d · #8ebb3a · #3abba8

Contrast

Deno Primary as textRatioAAAA largeAAAFix
Aaon white
7.34:1passpasspassPasses AAA — no fix needed.
Aaon black
2.86:1failfailfail
  • AA: use #865fce as the text (4.54:1)
  • AAA: use #a68adb as the text (7.28:1)
  • AA: or shift the background to #cccccc (4.57:1)
  • AAA: or shift the background to #fafafa (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 Deno Primary as the background.

Brands using this color

Fonts for this mood

Deno Primary reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around Deno Primary
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 #6639ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6639ba-af9cc4-dfcb4e-2a1f2d-e9eaf1?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