Color

#28545c

#28545c
hex#28545c
rgbrgb(40, 84, 92)
hslhsl(189, 39%, 26%)
oklchoklch(0.418 0.05 210.8)
Closest name: darkslategray (#2f4f4f)Relative luminance 0.0756

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5c3028

#285c4a · #283b5c

#5c2854 · #545c28

Split-complementary

Open in tool →

#5c283b · #5c4a28

#4a285c · #5c3028 · #3b5c28

Contrast

#28545c as textRatioAAAA largeAAAFix
Aaon white
8.36:1passpasspassPasses AAA — no fix needed.
Aaon black
2.51:1failfailfail
  • AA: use #3d7f8a as the text (4.6:1)
  • AAA: use #4ea2b1 as the text (7.13:1)
  • AA: or shift the background to #bfbfbf (4.54:1)
  • AAA: or shift the background to #ebebeb (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #28545c 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

#28545c reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #28545c
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 #28545c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28545c-a2b7be-df4e7e-1f252d-e9f1ee?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