Color

#3831af

#3831af
hex#3831af
rgbrgb(56, 49, 175)
hslhsl(243, 56%, 44%)
oklchoklch(0.412 0.191 276.4)
Closest name: Bluebell (#333399)Relative luminance 0.0613

Colors that go with #3831af

Charcoal, Sea Green 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 →

#a9af31

#316aaf · #7631af

#af3831 · #31af38

Split-complementary

Open in tool →

#af7631 · #6aaf31

#af316a · #a9af31 · #31af76

Contrast

#3831af as textRatioAAAA largeAAAFix
Aaon white
9.43:1passpasspassPasses AAA — no fix needed.
Aaon black
2.23:1failfailfail
  • AA: use #6d68d4 as the text (4.58:1)
  • AAA: use #9490e0 as the text (7.32:1)
  • AA: or shift the background to #b5b5b5 (4.6:1)
  • AAA: or shift the background to #dedede (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3831af 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

#3831af reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3831af
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 #3831af and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3831af-a39cc4-dfa04e-261f2d-e9edf1?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