Color

#215ec0

#215ec0
hex#215ec0
rgbrgb(33, 94, 192)
hslhsl(217, 71%, 44%)
oklchoklch(0.501 0.166 259.8)
Closest name: Denim (#1560bd)Relative luminance 0.1213

Colors that go with #215ec0

Charcoal, Crimson and Sienna 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 →

#c08321

#21adc0 · #3321c0

#c0215e · #5ec021

Split-complementary

Open in tool →

#c03321 · #adc021

#c021ad · #c08321 · #21c033

Contrast

#215ec0 as textRatioAAAA largeAAAFix
Aaon white
6.13:1passpassfail
  • AAA: use #1e55ae as the text (7.08:1)
Aaon black
3.43:1failpassfail
  • AA: use #3273dc as the text (4.62:1)
  • AAA: use #6697e5 as the text (7.12:1)
  • AA: or shift the background to #dedede (4.55:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #215ec0 as the background.

Brands using this color

Fonts for this mood

#215ec0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #215ec0
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 #215ec0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/215ec0-9ca7c4-df624e-201f2d-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