Color

#181faa

#181faa
hex#181faa
rgbrgb(24, 31, 170)
hslhsl(237, 75%, 38%)
oklchoklch(0.365 0.21 268.1)
Closest name: Dark Galaxy (#0018a8)Relative luminance 0.0408

Tints & shades

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

Harmonies

Complementary

Open in tool →

#aaa218

#1868aa · #5a18aa

#aa181f · #1faa18

Split-complementary

Open in tool →

#aa5a18 · #68aa18

#aa1868 · #aaa218 · #18aa5a

Contrast

#181faa as textRatioAAAA largeAAAFix
Aaon white
11.57:1passpasspassPasses AAA — no fix needed.
Aaon black
1.82:1failfailfail
  • AA: use #5e65e8 as the text (4.5:1)
  • AAA: use #878cee as the text (7.02:1)
  • AA: or shift the background to #a3a3a3 (4.59:1)
  • AAA: or shift the background to #cccccc (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #181faa 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

#181faa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #181faa
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 #181faa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/181faa-9f9cc4-df924e-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