Color

#283c5d

#283c5d
hex#283c5d
rgbrgb(40, 60, 93)
hslhsl(217, 40%, 26%)
oklchoklch(0.356 0.063 260)
Closest name: Black Turmeric (#2c4364)Relative luminance 0.0447

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5d4828

#28575d · #2e285d

#5d283c · #3c5d28

Split-complementary

Open in tool →

#5d2e28 · #575d28

#5d2857 · #5d4828 · #285d2e

Contrast

#283c5d as textRatioAAAA largeAAAFix
Aaon white
11.08:1passpasspassPasses AAA — no fix needed.
Aaon black
1.89:1failfailfail
  • AA: use #5076b4 as the text (4.59:1)
  • AAA: use #7b98c6 as the text (7.15:1)
  • AA: or shift the background to #a6a6a6 (4.55:1)
  • AAA: or shift the background to #cfcfcf (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283c5d 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

#283c5d reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283c5d
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 #283c5d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283c5d-9ca7c4-df624e-201f2d-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