Color

#18abd8

#18abd8
hex#18abd8
rgbrgb(24, 171, 216)
hslhsl(194, 80%, 47%)
oklchoklch(0.691 0.128 226)
Closest name: Aquarius (#2db0ce)Relative luminance 0.3428

Colors that go with #18abd8

Charcoal, Amber and Blue 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 →

#d84518

#18d8a5 · #184bd8

#d818ab · #abd818

Split-complementary

Open in tool →

#d8184b · #d8a518

#a518d8 · #d84518 · #4bd818

Contrast

#18abd8 as textRatioAAAA largeAAAFix
Aaon white
2.67:1failfailfail
  • AA: use #127fa1 as the text (4.59:1)
  • AAA: use #0d5f77 as the text (7.19:1)
  • AA: or shift the background to #363636 (4.52:1)
  • AAA: or shift the background to #121212 (7.01:1)
Aaon black
7.86:1passpasspassPasses 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 #18abd8 as the background.

Brands using this color

Fonts for this mood

#18abd8 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #18abd8
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 #18abd8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/18abd8-9cb6c4-df4e72-1f242d-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