Color

#337ceb

#337ceb
hex#337ceb
rgbrgb(51, 124, 235)
hslhsl(216, 82%, 56%)
oklchoklch(0.601 0.183 258.9)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2112

Colors that go with #337ceb

Charcoal, Crimson and Copper 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 →

#eba133

#33d8eb · #4533eb

#eb337c · #7ceb33

Split-complementary

Open in tool →

#eb4533 · #d8eb33

#eb33d8 · #eba133 · #33eb45

Contrast

#337ceb as textRatioAAAA largeAAAFix
Aaon white
4.02:1failpassfail
  • AA: use #2071e9 as the text (4.57:1)
  • AAA: use #1253b5 as the text (7.17:1)
  • AA: or shift the background to #141414 (4.58:1)
Aaon black
5.22:1passpassfail
  • AAA: use #5d97ef as the text (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #337ceb 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

#337ceb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #337ceb
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 #337ceb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/337ceb-9ca7c4-df5f4e-201f2d-e9f0f1?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