Color

#153d8e

#153d8e
hex#153d8e
rgbrgb(21, 61, 142)
hslhsl(220, 74%, 32%)
oklchoklch(0.386 0.142 262.2)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0545

Colors that go with #153d8e

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 →

#8e6615

#157a8e · #29158e

#8e153d · #3d8e15

Split-complementary

Open in tool →

#8e2915 · #7a8e15

#8e157a · #8e6615 · #158e29

Contrast

#153d8e as textRatioAAAA largeAAAFix
Aaon white
10.05:1passpasspassPasses AAA — no fix needed.
Aaon black
2.09:1failfailfail
  • AA: use #3770e1 as the text (4.57:1)
  • AAA: use #6d96e9 as the text (7.19:1)
  • AA: or shift the background to #b0b0b0 (4.63:1)
  • AAA: or shift the background to #d9d9d9 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #153d8e as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#153d8e reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #153d8e
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 #153d8e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/153d8e-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