Color

#151e79

#151e79
hex#151e79
rgbrgb(21, 30, 121)
hslhsl(235, 70%, 28%)
oklchoklch(0.304 0.151 269.4)
Closest name: midnightblue (#191970)Relative luminance 0.0247

Tints & shades

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

Harmonies

Complementary

Open in tool →

#797115

#155079 · #3f1579

#79151e · #1e7915

Split-complementary

Open in tool →

#793f15 · #507915

#791550 · #797115 · #15793f

Contrast

#151e79 as textRatioAAAA largeAAAFix
Aaon white
14.06:1passpasspassPasses AAA — no fix needed.
Aaon black
1.49:1failfailfail
  • AA: use #5f6ae3 as the text (4.66:1)
  • AAA: use #868eea as the text (7.07:1)
  • AA: or shift the background to #949494 (4.63:1)
  • AAA: or shift the background to #b8b8b8 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #151e79 as the background.

Brands using this color

Fonts for this mood

#151e79 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151e79
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 #151e79 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151e79-9e9cc4-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