Color

#688bf3

#688bf3
hex#688bf3
rgbrgb(104, 139, 243)
hslhsl(225, 85%, 68%)
oklchoklch(0.66 0.16 267.9)
Closest name: cornflowerblue (#6495ed)Relative luminance 0.2788

Colors that go with #688bf3

Charcoal, Orange Red and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#f3d068

#68d0f3 · #8b68f3

#f3688b · #8bf368

Split-complementary

Open in tool →

#f38b68 · #d0f368

#f368d0 · #f3d068 · #68f38b

Contrast

#688bf3 as textRatioAAAA largeAAAFix
Aaon white
3.19:1failpassfail
  • AA: use #3e6aef as the text (4.65:1)
  • AAA: use #1246e2 as the text (7:1)
  • AA: or shift the background to #292929 (4.56:1)
Aaon black
6.58:1passpassfail
  • AAA: use #7192f4 as the text (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #688bf3 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

#688bf3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #688bf3
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #688bf3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/688bf3-9ca1c4-df754e-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