Color

#15cbef

#15cbef
hex#15cbef
rgbrgb(21, 203, 239)
hslhsl(190, 87%, 51%)
oklchoklch(0.777 0.136 217)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.491

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ef3a15

#15efa6 · #155eef

#ef15cb · #cbef15

Split-complementary

Open in tool →

#ef155e · #efa615

#a615ef · #ef3a15 · #5eef15

Contrast

#15cbef as textRatioAAAA largeAAAFix
Aaon white
1.94:1failfailfail
  • AA: use #0b8199 as the text (4.55:1)
  • AAA: use #086172 as the text (7.09:1)
  • AA: or shift the background to #4a4a4a (4.57:1)
  • AAA: or shift the background to #2b2b2b (7.3:1)
Aaon black
10.82:1passpasspassPasses 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 #15cbef 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

#15cbef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #15cbef
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 #15cbef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15cbef-a2b6be-df4e7c-1f252d-e9f1ef?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