Color

#153a8a

#153a8a
hex#153a8a
rgbrgb(21, 58, 138)
hslhsl(221, 74%, 31%)
oklchoklch(0.376 0.14 262.8)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0502

Colors that go with #153a8a

Charcoal, Steel Blue and 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 →

#8a6415

#15748a · #2a158a

#8a153a · #3a8a15

Split-complementary

Open in tool →

#8a2a15 · #748a15

#8a1574 · #8a6415 · #158a2a

Contrast

#153a8a as textRatioAAAA largeAAAFix
Aaon white
10.48:1passpasspassPasses AAA — no fix needed.
Aaon black
2:1failfailfail
  • AA: use #3c70e2 as the text (4.61:1)
  • AAA: use #6d94e9 as the text (7.06:1)
  • AA: or shift the background to #ababab (4.56:1)
  • AAA: or shift the background to #d4d4d4 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #153a8a 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

#153a8a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #153a8a
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 #153a8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/153a8a-9ca4c4-df6b4e-211f2d-e9eff1?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