Color

#181ca5

#181ca5
hex#181ca5
rgbrgb(24, 28, 165)
hslhsl(238, 75%, 37%)
oklchoklch(0.355 0.207 268.4)
Closest name: Dark Galaxy (#0018a8)Relative luminance 0.0374

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a5a018

#1863a5 · #5a18a5

#a5181c · #1ca518

Split-complementary

Open in tool →

#a55a18 · #63a518

#a51863 · #a5a018 · #18a55a

Contrast

#181ca5 as textRatioAAAA largeAAAFix
Aaon white
12.01:1passpasspassPasses AAA — no fix needed.
Aaon black
1.75:1failfailfail
  • AA: use #6367e9 as the text (4.65:1)
  • AAA: use #8b8eee as the text (7.2:1)
  • AA: or shift the background to #a1a1a1 (4.65:1)
  • AAA: or shift the background to #c7c7c7 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #181ca5 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

#181ca5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #181ca5
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 #181ca5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/181ca5-9f9cc4-df944e-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