Color

#333557

#333557
hex#333557
rgbrgb(51, 53, 87)
hslhsl(237, 26%, 27%)
oklchoklch(0.344 0.059 280.2)
Closest name: Deep Sea Base (#2c2c57)Relative luminance 0.0394

Colors that go with #333557

Dark Olive Green, Steel Blue and Teal 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 →

#575533

#334757 · #433357

#573335 · #355733

Split-complementary

Open in tool →

#574333 · #475733

#573347 · #575533 · #335743

Contrast

#333557 as textRatioAAAA largeAAAFix
Aaon white
11.75:1passpasspassPasses AAA — no fix needed.
Aaon black
1.79:1failfailfail
  • AA: use #6e71aa as the text (4.61:1)
  • AAA: use #9294bf as the text (7.21:1)
  • AA: or shift the background to #a1a1a1 (4.55:1)
  • AAA: or shift the background to #c9c9c9 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #333557 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

#333557 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #333557
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 #333557 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/333557-9f9cc4-df924e-251f2d-e9edf1?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