Color

#151c84

#151c84
hex#151c84
rgbrgb(21, 28, 132)
hslhsl(236, 73%, 30%)
oklchoklch(0.314 0.168 269.1)
Closest name: midnightblue (#191970)Relative luminance 0.0266

Tints & shades

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

Harmonies

Complementary

Open in tool →

#847d15

#155484 · #451584

#84151c · #1c8415

Split-complementary

Open in tool →

#844515 · #548415

#841554 · #847d15 · #158445

Contrast

#151c84 as textRatioAAAA largeAAAFix
Aaon white
13.71:1passpasspassPasses AAA — no fix needed.
Aaon black
1.53:1failfailfail
  • AA: use #6069e6 as the text (4.66:1)
  • AAA: use #888fec as the text (7.19:1)
  • AA: or shift the background to #949494 (4.52:1)
  • AAA: or shift the background to #bababa (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #151c84 as the background.

Brands using this color

Fonts for this mood

#151c84 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151c84
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 #151c84 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151c84-9e9cc4-df8f4e-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