Color

#28455d

#28455d
hex#28455d
rgbrgb(40, 69, 93)
hslhsl(207, 40%, 26%)
oklchoklch(0.379 0.054 244.9)
Closest name: Black Turmeric (#2c4364)Relative luminance 0.055

Colors that go with #28455d

Teal, Sienna and Blue 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 →

#5d4028

#285d5a · #282a5d

#5d2845 · #455d28

Split-complementary

Open in tool →

#5d282a · #5d5a28

#5a285d · #5d4028 · #2a5d28

Contrast

#28455d as textRatioAAAA largeAAAFix
Aaon white
10:1passpasspassPasses AAA — no fix needed.
Aaon black
2.1:1failfailfail
  • AA: use #467aa4 as the text (4.58:1)
  • AAA: use #6d9bc0 as the text (7.1:1)
  • AA: or shift the background to #b0b0b0 (4.61:1)
  • AAA: or shift the background to #d9d9d9 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #28455d as the background.

Brands using this color

Fonts for this mood

#28455d reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #28455d
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 #28455d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28455d-9cadc4-df4e53-1f212d-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