Color

#311bda

#311bda
hex#311bda
rgbrgb(49, 27, 218)
hslhsl(247, 78%, 48%)
oklchoklch(0.431 0.259 272.1)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.065

Tints & shades

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

Harmonies

Complementary

Open in tool →

#c4da1b

#1b64da · #911bda

#da311b · #1bda31

Split-complementary

Open in tool →

#da911b · #64da1b

#da1b64 · #c4da1b · #1bda91

Contrast

#311bda as textRatioAAAA largeAAAFix
Aaon white
9.13:1passpasspassPasses AAA — no fix needed.
Aaon black
2.3:1failfailfail
  • AA: use #7060eb as the text (4.56:1)
  • AAA: use #9589f0 as the text (7.11:1)
  • AA: or shift the background to #b8b8b8 (4.6:1)
  • AAA: or shift the background to #e3e3e3 (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 #311bda 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

#311bda reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #311bda
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 #311bda and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/311bda-a59cc4-dfaa4e-271f2d-e9ecf1?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