Color

#151d7a

#151d7a
hex#151d7a
rgbrgb(21, 29, 122)
hslhsl(235, 71%, 28%)
oklchoklch(0.304 0.154 269.5)
Closest name: midnightblue (#191970)Relative luminance 0.0244

Tints & shades

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

Harmonies

Complementary

Open in tool →

#7a7215

#15507a · #3f157a

#7a151d · #1d7a15

Split-complementary

Open in tool →

#7a3f15 · #507a15

#7a1550 · #7a7215 · #157a3f

Contrast

#151d7a as textRatioAAAA largeAAAFix
Aaon white
14.11:1passpasspassPasses AAA — no fix needed.
Aaon black
1.49:1failfailfail
  • AA: use #5e69e4 as the text (4.62:1)
  • AAA: use #8991eb as the text (7.31:1)
  • AA: or shift the background to #949494 (4.65:1)
  • AAA: or shift the background to #b8b8b8 (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 #151d7a as the background.

Brands using this color

Fonts for this mood

#151d7a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151d7a
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 #151d7a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151d7a-9e9cc4-df8d4e-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