Color

#150bd0

#150bd0
hex#150bd0
rgbrgb(21, 11, 208)
hslhsl(243, 90%, 43%)
oklchoklch(0.397 0.262 266.6)
Closest name: mediumblue (#0000cd)Relative luminance 0.0495

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#c6d00b

#0b64d0 · #780bd0

#d0150b · #0bd015

Split-complementary

Open in tool →

#d0780b · #64d00b

#d00b64 · #c6d00b · #0bd078

Contrast

#150bd0 as textRatioAAAA largeAAAFix
Aaon white
10.55:1passpasspassPasses AAA — no fix needed.
Aaon black
1.99:1failfailfail
  • AA: use #675ff7 as the text (4.56:1)
  • AAA: use #908bf9 as the text (7.25:1)
  • AA: or shift the background to #ababab (4.59:1)
  • AAA: or shift the background to #d4d4d4 (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 #150bd0 as the background.

Brands using this color

Fonts for this mood

#150bd0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #150bd0
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #150bd0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/150bd0-a39cc4-dfa04e-261f2d-e9edf1?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