Color

#519bf6

#519bf6
hex#519bf6
rgbrgb(81, 155, 246)
hslhsl(213, 90%, 64%)
oklchoklch(0.684 0.154 254.9)
Closest name: cornflowerblue (#6495ed)Relative luminance 0.3185

Colors that go with #519bf6

Charcoal, Medium Sea Green and Tomato 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 #519bf6

Tints & shades

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

Harmonies

Complementary

Open in tool →

#f6ab51

#51eef6 · #5951f6

#f6519b · #9bf651

Split-complementary

Open in tool →

#f65951 · #eef651

#f651ee · #f6ab51 · #51f659

Contrast

#519bf6 as textRatioAAAA largeAAAFix
Aaon white
2.85:1failfailfail
  • AA: use #0c72ed as the text (4.52:1)
  • AAA: use #0956b3 as the text (7.01:1)
  • AA: or shift the background to #303030 (4.63:1)
  • AAA: or shift the background to #080808 (7.03:1)
Aaon black
7.37:1passpasspassPasses 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 #519bf6 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

#519bf6 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #519bf6
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 #519bf6 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/519bf6-9ca9c4-df584e-1f202d-e9f0f1?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