Color

#0031b8

#0031b8
hex#0031b8
rgbrgb(0, 49, 184)
hslhsl(224, 100%, 36%)
oklchoklch(0.401 0.214 263.5)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0566

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b88700

#008db8 · #2b00b8

#b80031 · #31b800

Split-complementary

Open in tool →

#b82b00 · #8db800

#b8008d · #b88700 · #00b82b

Contrast

#0031b8 as textRatioAAAA largeAAAFix
Aaon white
9.85:1passpasspassPasses AAA — no fix needed.
Aaon black
2.13:1failfailfail
  • AA: use #3369ff as the text (4.61:1)
  • AAA: use #6b93ff as the text (7.24:1)
  • AA: or shift the background to #b0b0b0 (4.54:1)
  • AAA: or shift the background to #dbdbdb (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 #0031b8 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

#0031b8 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0031b8
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 #0031b8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0031b8-9ca2c4-df724e-221f2d-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