Color

#2331af

#2331af
hex#2331af
rgbrgb(35, 49, 175)
hslhsl(234, 67%, 41%)
oklchoklch(0.4 0.197 269.3)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0565

Colors that go with #2331af

Charcoal, Steel Blue 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 →

#afa123

#2377af · #5b23af

#af2331 · #31af23

Split-complementary

Open in tool →

#af5b23 · #77af23

#af2377 · #afa123 · #23af5b

Contrast

#2331af as textRatioAAAA largeAAAFix
Aaon white
9.86:1passpasspassPasses AAA — no fix needed.
Aaon black
2.13:1failfailfail
  • AA: use #5d6adf as the text (4.59:1)
  • AAA: use #8891e7 as the text (7.25:1)
  • AA: or shift the background to #b0b0b0 (4.55:1)
  • AAA: or shift the background to #dbdbdb (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2331af 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

#2331af reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2331af
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 #2331af and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2331af-9d9cc4-df8a4e-241f2d-e9eef1?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