Color

#33aaff

#33aaff
hex#33aaff
rgbrgb(51, 170, 255)
hslhsl(205, 100%, 60%)
oklchoklch(0.713 0.16 245.1)
Closest name: Cerulean (#55aaee)Relative luminance 0.3667

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ff8833

#33ffee · #3344ff

#ff33aa · #aaff33

Split-complementary

Open in tool →

#ff3344 · #ffee33

#ee33ff · #ff8833 · #44ff33

Contrast

#33aaff as textRatioAAAA largeAAAFix
Aaon white
2.52:1failfailfail
  • AA: use #0077cc as the text (4.66:1)
  • AAA: use #005999 as the text (7.27:1)
  • AA: or shift the background to #383838 (4.65:1)
  • AAA: or shift the background to #171717 (7.12:1)
Aaon black
8.33:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #33aaff as the background.

Brands using this color

Fonts for this mood

#33aaff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #33aaff
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 #33aaff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/33aaff-9cafc4-df4e58-1f212d-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