Color

#6388ee

#6388ee
hex#6388ee
rgbrgb(99, 136, 238)
hslhsl(224, 80%, 66%)
oklchoklch(0.648 0.158 267)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2643

Tints & shades

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

Harmonies

Complementary

Open in tool →

#eec963

#63cdee · #8363ee

#ee6388 · #88ee63

Split-complementary

Open in tool →

#ee8363 · #cdee63

#ee63cd · #eec963 · #63ee83

Contrast

#6388ee as textRatioAAAA largeAAAFix
Aaon white
3.34:1failpassfail
  • AA: use #3e6cea as the text (4.63:1)
  • AAA: use #174ad3 as the text (7.1:1)
  • AA: or shift the background to #262626 (4.53:1)
Aaon black
6.29:1passpassfail
  • AAA: use #7192ef as the text (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #6388ee 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

#6388ee reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6388ee
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 #6388ee and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6388ee-9ca2c4-df724e-221f2d-e9eff1?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