Color

#4991df

#4991df
hex#4991df
rgbrgb(73, 145, 223)
hslhsl(211, 70%, 58%)
oklchoklch(0.646 0.138 252.3)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2699

Colors that go with #4991df

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 →

#df9649

#49dcdf · #4b49df

#df4991 · #91df49

Split-complementary

Open in tool →

#df4b49 · #dcdf49

#df49dc · #df9649 · #49df4b

Contrast

#4991df as textRatioAAAA largeAAAFix
Aaon white
3.28:1failpassfail
  • AA: use #2475cc as the text (4.68:1)
  • AAA: use #1c5a9c as the text (7.02:1)
  • AA: or shift the background to #262626 (4.61:1)
Aaon black
6.4:1passpassfail
  • AAA: use #5699e1 as the text (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4991df 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

#4991df reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4991df
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 #4991df and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4991df-9cabc4-df534e-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