Color

#102d42

#102d42
hex#102d42
rgbrgb(16, 45, 66)
hslhsl(205, 61%, 16%)
oklchoklch(0.286 0.052 243)
Closest name: Eternal Darkness (#1c2841)Relative luminance 0.0238

Colors that go with #102d42

Royal Blue, Rust and Sienna 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 #102d42

Tints & shades

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

Harmonies

Complementary

Open in tool →

#422510

#10423e · #101442

#42102d · #2d4210

Split-complementary

Open in tool →

#421014 · #423e10

#3e1042 · #422510 · #144210

Contrast

#102d42 as textRatioAAAA largeAAAFix
Aaon white
14.23:1passpasspassPasses AAA — no fix needed.
Aaon black
1.48:1failfailfail
  • AA: use #2c7cb5 as the text (4.66:1)
  • AAA: use #4e9cd4 as the text (7.03:1)
  • AA: or shift the background to #919191 (4.51:1)
  • AAA: or shift the background to #b8b8b8 (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #102d42 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

#102d42 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #102d42
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 #102d42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/102d42-9cafc4-df4e58-1f212d-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