Color

#28899a

#28899a
hex#28899a
rgbrgb(40, 137, 154)
hslhsl(189, 59%, 38%)
oklchoklch(0.583 0.09 211.9)
Closest name: darkcyan (#008b8b)Relative luminance 0.2068

Colors that go with #28899a

Charcoal, Copper and Crimson lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9a3928

#289a72 · #28509a

#9a2889 · #899a28

Split-complementary

Open in tool →

#9a2850 · #9a7228

#72289a · #9a3928 · #509a28

Contrast

#28899a as textRatioAAAA largeAAAFix
Aaon white
4.09:1failpassfail
  • AA: use #257e8e as the text (4.72:1)
  • AAA: use #1c616d as the text (7.05:1)
  • AA: or shift the background to #141414 (4.5:1)
Aaon black
5.14:1passpassfail
  • AAA: use #30a6bb as the text (7.3:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #28899a 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

#28899a reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #28899a
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #28899a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28899a-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