Color

#6370fd

#6370fd
hex#6370fd
rgbrgb(99, 112, 253)
hslhsl(235, 97%, 69%)
oklchoklch(0.612 0.207 274.5)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2133

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fdf063

#63bdfd · #a363fd

#fd6370 · #70fd63

Split-complementary

Open in tool →

#fda363 · #bdfd63

#fd63bd · #fdf063 · #63fda3

Contrast

#6370fd as textRatioAAAA largeAAAFix
Aaon white
3.99:1failpassfail
  • AA: use #5462fc as the text (4.64:1)
  • AAA: use #2234fc as the text (7.08:1)
  • AA: or shift the background to #141414 (4.62:1)
Aaon black
5.27:1passpassfail
  • AAA: use #818cfd as the text (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #6370fd as the background.

Brands using this color

Fonts for this mood

#6370fd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6370fd
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 #6370fd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6370fd-9e9cc4-df8d4e-241f2d-e9eef1?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