Color

#2131de

#2131de
hex#2131de
rgbrgb(33, 49, 222)
hslhsl(235, 74%, 50%)
oklchoklch(0.451 0.252 267.6)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0779

Colors that go with #2131de

Charcoal, Sea Green 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 →

#dece21

#218fde · #7021de

#de2131 · #31de21

Split-complementary

Open in tool →

#de7021 · #8fde21

#de218f · #dece21 · #21de70

Contrast

#2131de as textRatioAAAA largeAAAFix
Aaon white
8.21:1passpasspassPasses AAA — no fix needed.
Aaon black
2.56:1failfailfail
  • AA: use #5f6be7 as the text (4.74:1)
  • AAA: use #8790ed as the text (7.24:1)
  • AA: or shift the background to #c2c2c2 (4.61:1)
  • AAA: or shift the background to #ededed (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2131de 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

#2131de reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2131de
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 #2131de and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2131de-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