Color

#375c81

#375c81
hex#375c81
rgbrgb(55, 92, 129)
hslhsl(210, 40%, 36%)
oklchoklch(0.464 0.074 249.7)
Closest name: Deep Indigo (#4c567a)Relative luminance 0.1005

Tints & shades

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

Harmonies

Complementary

Open in tool →

#815c37

#378181 · #373781

#81375c · #5c8137

Split-complementary

Open in tool →

#813737 · #818137

#813781 · #815c37 · #378137

Contrast

#375c81 as textRatioAAAA largeAAAFix
Aaon white
6.98:1passpassfail
  • AAA: use #36597d as the text (7.29:1)
Aaon black
3.01:1failpassfail
  • AA: use #4878a8 as the text (4.53:1)
  • AAA: use #7099c2 as the text (7.02:1)
  • AA: or shift the background to #d1d1d1 (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #375c81 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

#375c81 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #375c81
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 #375c81 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/375c81-9cabc4-df514e-1f202d-e9f1f1?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