brandsweets

Color

#0312e2

#0312e2
hex#0312e2
rgbrgb(3, 18, 226)
hslhsl(236, 97%, 45%)
oklchoklch(0.421 0.28 264.4)
Closest name: Brutally Blue (#0022dd)Relative luminance 0.0594
CoolVividTechnicalModern
Open in palette toolCheck contrastWhat goes with it ↓

Colors that go with #0312e2

Crimson, Charcoal and Cobalt 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.

Real palettes that use #0312e2

BBC· brandBinance· brandBurger King· brandBumble· brand

Tints & shades

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

Harmonies

Complementary

Open in tool →
0312e2e2d303

#e2d303

Analogous

Open in tool →
0312e20382e26403e2

#0382e2 · #6403e2

Triadic

Open in tool →
0312e2e2031212e203

#e20312 · #12e203

Split-complementary

Open in tool →
0312e2e2640382e203

#e26403 · #82e203

Tetradic

Open in tool →
0312e2e20382e2d30303e264

#e20382 · #e2d303 · #03e264

Contrast

#0312e2 as textRatioAAAA largeAAAFix
Aaon white
9.6:1passpasspassPasses AAA — no fix needed.
Aaon black
2.19:1failfailfail
  • AA: use #5964fc as the text (4.65:1)
  • AAA: use #868efd as the text (7.3:1)
  • AA: or shift the background to #b3b3b3 (4.58:1)
  • AAA: or shift the background to #dedede (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0312e2 as the background.

Brands using this color

Fonts for this mood

#0312e2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →
mcpConnect your agent — build around #0312e2
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 #0312e2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0312e2-9e9cc4-df8f4e-241f2d-e9eef1?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