Color

#10587e

#10587e
hex#10587e
rgbrgb(16, 88, 126)
hslhsl(201, 77%, 28%)
oklchoklch(0.438 0.091 238.4)
Closest name: Beyond the Sea (#005784)Relative luminance 0.086

Tints & shades

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

Harmonies

Complementary

Open in tool →

#7e3710

#107e6e · #10217e

#7e1058 · #587e10

Split-complementary

Open in tool →

#7e1021 · #7e6e10

#6e107e · #7e3710 · #217e10

Contrast

#10587e as textRatioAAAA largeAAAFix
Aaon white
7.72:1passpasspassPasses AAA — no fix needed.
Aaon black
2.72:1failfailfail
  • AA: use #177eb5 as the text (4.69:1)
  • AAA: use #229fe2 as the text (7.13:1)
  • AA: or shift the background to #c7c7c7 (4.57:1)
  • AAA: or shift the background to #f5f5f5 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #10587e 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

#10587e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #10587e
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 #10587e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/10587e-9cb1c4-df4e62-1f222d-e9f1f0?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