Color

#1d38e2

#1d38e2
hex#1d38e2
rgbrgb(29, 56, 226)
hslhsl(232, 77%, 50%)
oklchoklch(0.463 0.252 266.5)
Closest name: Bluebonnet (#1c1cf0)Relative luminance 0.0858

Colors that go with #1d38e2

Charcoal, Crimson and Sea Green 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 →

#e2c71d

#1d9ae2 · #651de2

#e21d38 · #38e21d

Split-complementary

Open in tool →

#e2651d · #9ae21d

#e21d9a · #e2c71d · #1de265

Contrast

#1d38e2 as textRatioAAAA largeAAAFix
Aaon white
7.73:1passpasspassPasses AAA — no fix needed.
Aaon black
2.72:1failfailfail
  • AA: use #586be9 as the text (4.69:1)
  • AAA: use #818fef as the text (7.11:1)
  • AA: or shift the background to #c7c7c7 (4.57:1)
  • AAA: or shift the background to #f5f5f5 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1d38e2 as the background.

Brands using this color

Fonts for this mood

#1d38e2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1d38e2
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 #1d38e2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1d38e2-9c9dc4-df864e-231f2d-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