Color

#1e38be

#1e38be
hex#1e38be
rgbrgb(30, 56, 190)
hslhsl(230, 73%, 43%)
oklchoklch(0.425 0.209 267)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0682

Colors that go with #1e38be

Charcoal, Sea Green and Steel 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 →

#bea31e

#1e88be · #531ebe

#be1e38 · #38be1e

Split-complementary

Open in tool →

#be531e · #88be1e

#be1e88 · #bea31e · #1ebe53

Contrast

#1e38be as textRatioAAAA largeAAAFix
Aaon white
8.88:1passpasspassPasses AAA — no fix needed.
Aaon black
2.36:1failfailfail
  • AA: use #536be4 as the text (4.59:1)
  • AAA: use #7f91eb as the text (7.15:1)
  • AA: or shift the background to #bababa (4.58:1)
  • AAA: or shift the background to #e6e6e6 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1e38be as the background.

Brands using this color

Fonts for this mood

#1e38be reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1e38be
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 #1e38be and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1e38be-9c9ec4-df814e-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