Color

#151d74

#151d74
hex#151d74
rgbrgb(21, 29, 116)
hslhsl(235, 69%, 27%)
oklchoklch(0.297 0.146 269.9)
Closest name: midnightblue (#191970)Relative luminance 0.023

Tints & shades

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

Harmonies

Complementary

Open in tool →

#746c15

#154d74 · #3d1574

#74151d · #1d7415

Split-complementary

Open in tool →

#743d15 · #4d7415

#74154d · #746c15 · #15743d

Contrast

#151d74 as textRatioAAAA largeAAAFix
Aaon white
14.39:1passpasspassPasses AAA — no fix needed.
Aaon black
1.46:1failfailfail
  • AA: use #606ae2 as the text (4.66:1)
  • AAA: use #868fe9 as the text (7.12:1)
  • AA: or shift the background to #919191 (4.56:1)
  • AAA: or shift the background to #b5b5b5 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #151d74 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

#151d74 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151d74
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 #151d74 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151d74-9e9cc4-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