Color

#333bc1

#333bc1
hex#333bc1
rgbrgb(51, 59, 193)
hslhsl(237, 58%, 48%)
oklchoklch(0.442 0.204 271.9)
Closest name: Denim (#2243b6)Relative luminance 0.0768

Tints & shades

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

Harmonies

Complementary

Open in tool →

#c1ba33

#3381c1 · #7333c1

#c1333b · #3bc133

Split-complementary

Open in tool →

#c17333 · #81c133

#c13381 · #c1ba33 · #33c173

Contrast

#333bc1 as textRatioAAAA largeAAAFix
Aaon white
8.28:1passpasspassPasses AAA — no fix needed.
Aaon black
2.54:1failfailfail
  • AA: use #666cd6 as the text (4.68:1)
  • AAA: use #8a8ee0 as the text (7.03:1)
  • AA: or shift the background to #bfbfbf (4.5:1)
  • AAA: or shift the background to #ededed (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #333bc1 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

#333bc1 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #333bc1
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 #333bc1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/333bc1-9f9cc4-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