Color

#0f3c8a

#0f3c8a
hex#0f3c8a
rgbrgb(15, 60, 138)
hslhsl(218, 80%, 30%)
oklchoklch(0.378 0.139 260.8)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0517

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8a5d0f

#0f798a · #200f8a

#8a0f3c · #3c8a0f

Split-complementary

Open in tool →

#8a200f · #798a0f

#8a0f79 · #8a5d0f · #0f8a20

Contrast

#0f3c8a as textRatioAAAA largeAAAFix
Aaon white
10.33:1passpasspassPasses AAA — no fix needed.
Aaon black
2.03:1failfailfail
  • AA: use #2c71e8 as the text (4.63:1)
  • AAA: use #6396ee as the text (7.13:1)
  • AA: or shift the background to #adadad (4.6:1)
  • AAA: or shift the background to #d6d6d6 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0f3c8a 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

#0f3c8a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0f3c8a
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #0f3c8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0f3c8a-9ca6c4-df644e-201f2d-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