Color

#283d4d

#283d4d
hex#283d4d
rgbrgb(40, 61, 77)
hslhsl(206, 32%, 23%)
oklchoklch(0.35 0.039 242)
Closest name: Capital Blue (#1a4157)Relative luminance 0.0432

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4d3828

#284d4b · #282a4d

#4d283d · #3d4d28

Split-complementary

Open in tool →

#4d282a · #4d4b28

#4b284d · #4d3828 · #2a4d28

Contrast

#283d4d as textRatioAAAA largeAAAFix
Aaon white
11.26:1passpasspassPasses AAA — no fix needed.
Aaon black
1.86:1failfailfail
  • AA: use #507a9b as the text (4.6:1)
  • AAA: use #759bb8 as the text (7.14:1)
  • AA: or shift the background to #a6a6a6 (4.63:1)
  • AAA: or shift the background to #cccccc (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 #283d4d 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

#283d4d reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283d4d
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 #283d4d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283d4d-9caec4-df4e56-1f212d-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