Color

#215dd4

#215dd4
hex#215dd4
rgbrgb(33, 93, 212)
hslhsl(220, 73%, 48%)
oklchoklch(0.514 0.194 262)
Closest name: Denim (#1560bd)Relative luminance 0.1291

Colors that go with #215dd4

Charcoal, Crimson and Amber 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 →

#d49821

#21b6d4 · #3f21d4

#d4215d · #5dd421

Split-complementary

Open in tool →

#d43f21 · #b6d421

#d421b6 · #d49821 · #21d43f

Contrast

#215dd4 as textRatioAAAA largeAAAFix
Aaon white
5.86:1passpassfail
  • AAA: use #1d51b9 as the text (7.17:1)
Aaon black
3.58:1failpassfail
  • AA: use #3870e0 as the text (4.56:1)
  • AAA: use #6d96e8 as the text (7.18:1)
  • AA: or shift the background to #e3e3e3 (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #215dd4 as the background.

Brands using this color

Fonts for this mood

#215dd4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #215dd4
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 #215dd4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/215dd4-9ca5c4-df694e-211f2d-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