Color

#212db0

#212db0
hex#212db0
rgbrgb(33, 45, 176)
hslhsl(235, 68%, 41%)
oklchoklch(0.394 0.202 269.1)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0533

Colors that go with #212db0

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 →

#b0a421

#2174b0 · #5d21b0

#b0212d · #2db021

Split-complementary

Open in tool →

#b05d21 · #74b021

#b02174 · #b0a421 · #21b05d

Contrast

#212db0 as textRatioAAAA largeAAAFix
Aaon white
10.16:1passpasspassPasses AAA — no fix needed.
Aaon black
2.07:1failfailfail
  • AA: use #606be1 as the text (4.69:1)
  • AAA: use #878fe8 as the text (7.12:1)
  • AA: or shift the background to #adadad (4.53:1)
  • AAA: or shift the background to #d9d9d9 (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #212db0 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

#212db0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #212db0
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 #212db0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/212db0-9e9cc4-df8d4e-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