Color

#ff513d

#ff513d
hex#ff513d
rgbrgb(255, 81, 61)
hslhsl(6, 100%, 62%)
oklchoklch(0.675 0.213 30.1)
Closest name: Blood Burst (#ff474c)Relative luminance 0.2748

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3decff

#ff3d8b · #ffb13d

#3dff51 · #513dff

Split-complementary

Open in tool →

#3dffb1 · #3d8bff

#8bff3d · #3decff · #b13dff

Contrast

#ff513d as textRatioAAAA largeAAAFix
Aaon white
3.23:1failpassfail
  • AA: use #eb1700 as the text (4.51:1)
  • AAA: use #ad1100 as the text (7.35:1)
  • AA: or shift the background to #292929 (4.5:1)
Aaon black
6.5:1passpassfail
  • AAA: use #ff6352 as the text (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff513d as the background.

Brands using this color

Fonts for this mood

#ff513d reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff513d
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 #ff513d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff513d-c4a59c-62cba3-2d271f-f1e9ec?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