Color

#5199ec

#5199ec
hex#5199ec
rgbrgb(81, 153, 236)
hslhsl(212, 80%, 62%)
oklchoklch(0.674 0.143 253.5)
Closest name: cornflowerblue (#6495ed)Relative luminance 0.3059

Colors that go with #5199ec

Charcoal, Medium Sea Green and Peru 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 →

#eca351

#51e6ec · #5651ec

#ec5199 · #99ec51

Split-complementary

Open in tool →

#ec5651 · #e6ec51

#ec51e6 · #eca351 · #51ec56

Contrast

#5199ec as textRatioAAAA largeAAAFix
Aaon white
2.95:1failfailfail
  • AA: use #1874dc as the text (4.59:1)
  • AAA: use #1257a5 as the text (7.16:1)
  • AA: or shift the background to #2e2e2e (4.6:1)
  • AAA: or shift the background to #000000 (7.12:1)
Aaon black
7.12:1passpasspassPasses 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 #5199ec 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

#5199ec reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5199ec
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 #5199ec and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5199ec-9caac4-df564e-1f202d-e9f1f1?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