Color

#3131af

#3131af
hex#3131af
rgbrgb(49, 49, 175)
hslhsl(240, 56%, 44%)
oklchoklch(0.408 0.193 273.7)
Closest name: Depths of Night (#2c319b)Relative luminance 0.0594

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#afaf31

#3170af · #7031af

#af3131 · #31af31

Split-complementary

Open in tool →

#af7031 · #70af31

#af3170 · #afaf31 · #31af70

Contrast

#3131af as textRatioAAAA largeAAAFix
Aaon white
9.59:1passpasspassPasses AAA — no fix needed.
Aaon black
2.19:1failfailfail
  • AA: use #6868d4 as the text (4.52:1)
  • AAA: use #9090e0 as the text (7.25:1)
  • AA: or shift the background to #b3b3b3 (4.58:1)
  • AAA: or shift the background to #dedede (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3131af 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

#3131af reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3131af
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #3131af and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3131af-a19cc4-df994e-251f2d-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