Color

#5bb4ec

#5bb4ec
hex#5bb4ec
rgbrgb(91, 180, 236)
hslhsl(203, 79%, 64%)
oklchoklch(0.738 0.118 238.8)
Closest name: Cerulean (#55aaee)Relative luminance 0.4092

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ec925b

#5becdb · #5b6cec

#ec5bb4 · #b4ec5b

Split-complementary

Open in tool →

#ec5b6c · #ecdb5b

#db5bec · #ec925b · #6cec5b

Contrast

#5bb4ec as textRatioAAAA largeAAAFix
Aaon white
2.29:1failfailfail
  • AA: use #167cbb as the text (4.53:1)
  • AAA: use #105b89 as the text (7.29:1)
  • AA: or shift the background to #404040 (4.53:1)
  • AAA: or shift the background to #212121 (7.04:1)
Aaon black
9.18:1passpasspassPasses 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 #5bb4ec as the background.

Brands using this color

Fonts for this mood

#5bb4ec reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5bb4ec
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 #5bb4ec and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5bb4ec-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