Color

#031b53

#031b53
hex#031b53
rgbrgb(3, 27, 83)
hslhsl(222, 93%, 17%)
oklchoklch(0.249 0.107 262.6)
Closest name: Interstellar Blue (#001155)Relative luminance 0.0143

Tints & shades

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

Harmonies

Complementary

Open in tool →

#543b03

#034454 · #130354

#54031b · #1b5403

Split-complementary

Open in tool →

#541303 · #445403

#540344 · #543b03 · #035413

Contrast

#031b53 as textRatioAAAA largeAAAFix
Aaon white
16.34:1passpasspassPasses AAA — no fix needed.
Aaon black
1.29:1failfailfail
  • AA: use #306cf8 as the text (4.63:1)
  • AAA: use #6693f9 as the text (7.11:1)
  • AA: or shift the background to #878787 (4.55:1)
  • AAA: or shift the background to #ababab (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #031b53 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

#031b53 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #031b53
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 #031b53 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/031b53-9ca3c4-df6e4e-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