Color

#1737ee

#1737ee
hex#1737ee
rgbrgb(23, 55, 238)
hslhsl(231, 86%, 51%)
oklchoklch(0.474 0.267 265.7)
Closest name: C64 Blue (#003aff)Relative luminance 0.0909

Colors that go with #1737ee

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 →

#eecd17

#17a2ee · #6217ee

#ee1737 · #37ee17

Split-complementary

Open in tool →

#ee6217 · #a2ee17

#ee17a2 · #eecd17 · #17ee62

Contrast

#1737ee as textRatioAAAA largeAAAFix
Aaon white
7.45:1passpasspassPasses AAA — no fix needed.
Aaon black
2.82:1failfailfail
  • AA: use #5068f2 as the text (4.6:1)
  • AAA: use #7f91f5 as the text (7.27:1)
  • AA: or shift the background to #c9c9c9 (4.5:1)
  • AAA: or shift the background to #fafafa (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1737ee as the background.

Brands using this color

Fonts for this mood

#1737ee reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1737ee
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 #1737ee and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1737ee-9c9ec4-df834e-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