Color

#315e63

#315e63
hex#315e63
rgbrgb(49, 94, 99)
hslhsl(186, 34%, 29%)
oklchoklch(0.452 0.05 204.9)
Closest name: Arctic Nights (#345c61)Relative luminance 0.0956

Colors that go with #315e63

Rust, Cadet Blue and Copper 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.

Real palettes that use #315e63

Tints & shades

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

Harmonies

Complementary

Open in tool →

#633631

#31634f · #314563

#63315e · #5e6331

Split-complementary

Open in tool →

#633145 · #634f31

#4f3163 · #633631 · #456331

Contrast

#315e63 as textRatioAAAA largeAAAFix
Aaon white
7.21:1passpasspassPasses AAA — no fix needed.
Aaon black
2.91:1failfailfail
  • AA: use #427f85 as the text (4.61:1)
  • AAA: use #54a2ab as the text (7.13:1)
  • AA: or shift the background to #cfcfcf (4.63:1)
  • AAA: or shift the background to #fcfcfc (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #315e63 as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#315e63 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #315e63
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 #315e63 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/315e63-a2b8be-df4e86-1f262d-e9f1ee?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