Color

#1678da

#1678da
hex#1678da
rgbrgb(22, 120, 218)
hslhsl(210, 82%, 47%)
oklchoklch(0.574 0.172 253.8)
Closest name: Royal Blue (#4169e1)Relative luminance 0.1867

Colors that go with #1678da

Charcoal, Crimson and Copper 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 →

#da7816

#16dada · #1616da

#da1678 · #78da16

Split-complementary

Open in tool →

#da1616 · #dada16

#da16da · #da7816 · #16da16

Contrast

#1678da as textRatioAAAA largeAAAFix
Aaon white
4.44:1failpassfail
  • AA: use #1575d5 as the text (4.63:1)
  • AAA: use #1059a2 as the text (7.06:1)
  • AA: or shift the background to #080808 (4.51:1)
Aaon black
4.73:1passpassfail
  • AAA: use #4599ed as the text (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1678da as the background.

Brands using this color

Fonts for this mood

#1678da reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1678da
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 #1678da and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1678da-9cabc4-df514e-1f202d-e9f1f1?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