Color

#05387a

#05387a
hex#05387a
rgbrgb(5, 56, 122)
hslhsl(214, 92%, 25%)
oklchoklch(0.353 0.123 257.9)
Closest name: Atlantic Navy (#13336f)Relative luminance 0.0427

Colors that go with #05387a

Charcoal, Crimson and Steel Blue 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 →

#7a4805

#05737a · #0d057a

#7a0538 · #387a05

Split-complementary

Open in tool →

#7a0d05 · #737a05

#7a0573 · #7a4805 · #057a0d

Contrast

#05387a as textRatioAAAA largeAAAFix
Aaon white
11.33:1passpasspassPasses AAA — no fix needed.
Aaon black
1.85:1failfailfail
  • AA: use #0a6ef0 as the text (4.5:1)
  • AAA: use #4f98f8 as the text (7.18:1)
  • AA: or shift the background to #a6a6a6 (4.66:1)
  • AAA: or shift the background to #cccccc (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #05387a 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

#05387a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #05387a
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 #05387a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/05387a-9ca9c4-df5a4e-1f1f2d-e9f0f1?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