Color

#230b3d

#230b3d
hex#230b3d
rgbrgb(35, 11, 61)
hslhsl(269, 69%, 14%)
oklchoklch(0.221 0.09 301.2)
Closest name: Your Darkness (#220044)Relative luminance 0.0093

Colors that go with #230b3d

Charcoal, Royal Blue and Sea Green 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#253c0b

#0b0c3c · #3c0b3c

#3c230b · #0b3c23

Split-complementary

Open in tool →

#3c3c0b · #0c3c0b

#3c0b0c · #253c0b · #0b3c3c

Contrast

#230b3d as textRatioAAAA largeAAAFix
Aaon white
17.7:1passpasspassPasses AAA — no fix needed.
Aaon black
1.19:1failfailfail
  • AA: use #9753df as the text (4.62:1)
  • AAA: use #b17ee7 as the text (7.01:1)
  • AA: or shift the background to #828282 (4.6:1)
  • AAA: or shift the background to #a3a3a3 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #230b3d 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

#230b3d reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #230b3d
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 #230b3d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/230b3d-b49cc4-cbcb62-2c1f2d-e9e9f1?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