Color

#258e8a

#258e8a
hex#258e8a
rgbrgb(37, 142, 138)
hslhsl(178, 59%, 35%)
oklchoklch(0.589 0.092 191.1)
Closest name: darkcyan (#008b8b)Relative luminance 0.2157

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8e2528

#258e56 · #255d8e

#8a258e · #8e8a25

Split-complementary

Open in tool →

#8e255d · #8e5625

#56258e · #8e2528 · #5d8e25

Contrast

#258e8a as textRatioAAAA largeAAAFix
Aaon white
3.95:1failpassfail
  • AA: use #21827f as the text (4.6:1)
  • AAA: use #19615f as the text (7.2:1)
  • AA: or shift the background to #171717 (4.54:1)
Aaon black
5.31:1passpassfail
  • AAA: use #2ba6a2 as the text (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 #258e8a as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #258e8a
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 #258e8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/258e8a-a2bcbe-d45999-1f282d-e9f1ed?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