Color

#153c8a

#153c8a
hex#153c8a
rgbrgb(21, 60, 138)
hslhsl(220, 74%, 31%)
oklchoklch(0.38 0.138 262.1)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0523

Colors that go with #153c8a

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 →

#8a6315

#15768a · #28158a

#8a153c · #3c8a15

Split-complementary

Open in tool →

#8a2815 · #768a15

#8a1576 · #8a6315 · #158a28

Contrast

#153c8a as textRatioAAAA largeAAAFix
Aaon white
10.27:1passpasspassPasses AAA — no fix needed.
Aaon black
2.05:1failfailfail
  • AA: use #3770e1 as the text (4.57:1)
  • AAA: use #6d96e9 as the text (7.19:1)
  • AA: or shift the background to #adadad (4.58:1)
  • AAA: or shift the background to #d6d6d6 (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 #153c8a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#153c8a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #153c8a
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 #153c8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/153c8a-9ca5c4-df694e-211f2d-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