Color

#51a2bd

#51a2bd
hex#51a2bd
rgbrgb(81, 162, 189)
hslhsl(195, 45%, 53%)
oklchoklch(0.672 0.088 222.4)
Closest name: Frozen Wave (#56acca)Relative luminance 0.3126

Colors that go with #51a2bd

Charcoal, Terracotta and Amber 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.

Real palettes that use #51a2bd

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bd6c51

#51bda2 · #516cbd

#bd51a2 · #a2bd51

Split-complementary

Open in tool →

#bd516c · #bda251

#a251bd · #bd6c51 · #6cbd51

Contrast

#51a2bd as textRatioAAAA largeAAAFix
Aaon white
2.9:1failfailfail
  • AA: use #387d94 as the text (4.64:1)
  • AAA: use #2a5e6f as the text (7.17:1)
  • AA: or shift the background to #303030 (4.56:1)
  • AAA: or shift the background to #050505 (7.04:1)
Aaon black
7.25:1passpasspassPasses 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 #51a2bd 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

#51a2bd reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #51a2bd
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 #51a2bd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51a2bd-9cb5c4-df4e70-1f242d-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