Color

#0831b4

#0831b4
hex#0831b4
rgbrgb(8, 49, 180)
hslhsl(226, 91%, 37%)
oklchoklch(0.398 0.208 264.3)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0554

Colors that go with #0831b4

Charcoal, Crimson and Steel 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 →

#b48c08

#0886b4 · #3608b4

#b40831 · #31b408

Split-complementary

Open in tool →

#b43608 · #86b408

#b40886 · #b48c08 · #08b436

Contrast

#0831b4 as textRatioAAAA largeAAAFix
Aaon white
9.96:1passpasspassPasses AAA — no fix needed.
Aaon black
2.11:1failfailfail
  • AA: use #416bf6 as the text (4.66:1)
  • AAA: use #7291f8 as the text (7.12:1)
  • AA: or shift the background to #b0b0b0 (4.59:1)
  • AAA: or shift the background to #d9d9d9 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0831b4 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

#0831b4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0831b4
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 #0831b4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0831b4-9ca1c4-df774e-221f2d-e9eff1?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