Color

#375781

#375781
hex#375781
rgbrgb(55, 87, 129)
hslhsl(214, 40%, 36%)
oklchoklch(0.452 0.079 255.7)
Closest name: Deep Indigo (#4c567a)Relative luminance 0.0921

Tints & shades

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

Harmonies

Complementary

Open in tool →

#816137

#377c81 · #3c3781

#813757 · #578137

Split-complementary

Open in tool →

#813c37 · #7c8137

#81377c · #816137 · #37813c

Contrast

#375781 as textRatioAAAA largeAAAFix
Aaon white
7.39:1passpasspassPasses AAA — no fix needed.
Aaon black
2.84:1failfailfail
  • AA: use #4b76af as the text (4.51:1)
  • AAA: use #7799c5 as the text (7.15:1)
  • AA: or shift the background to #cccccc (4.6:1)
  • AAA: or shift the background to #fafafa (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #375781 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

#375781 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #375781
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 #375781 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/375781-9ca9c4-df5a4e-1f1f2d-e9f0f1?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