Color

#33688a

#33688a
hex#33688a
rgbrgb(51, 104, 138)
hslhsl(203, 46%, 37%)
oklchoklch(0.496 0.078 239.2)
Closest name: Chill of the Night (#256d8d)Relative luminance 0.1244

Colors that go with #33688a

Charcoal, Royal Blue and Sienna 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 →

#8a5433

#338a80 · #333d8a

#8a3368 · #688a33

Split-complementary

Open in tool →

#8a333d · #8a8033

#80338a · #8a5433 · #3d8a33

Contrast

#33688a as textRatioAAAA largeAAAFix
Aaon white
6.02:1passpassfail
  • AAA: use #2d5d7b as the text (7.09:1)
Aaon black
3.49:1failpassfail
  • AA: use #3d7ca4 as the text (4.62:1)
  • AAA: use #5f9dc4 as the text (7.11:1)
  • AA: or shift the background to #e0e0e0 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #33688a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#33688a reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #33688a
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 #33688a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/33688a-9cb0c4-df4e5d-1f222d-e9f1f0?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