Color

#21044e

#21044e
hex#21044e
rgbrgb(33, 4, 78)
hslhsl(264, 90%, 16%)
oklchoklch(0.228 0.12 291.5)
Closest name: Your Darkness (#220044)Relative luminance 0.0096

Tints & shades

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

Harmonies

Complementary

Open in tool →

#304e04

#040b4e · #46044e

#4e2104 · #044e21

Split-complementary

Open in tool →

#4e4604 · #0b4e04

#4e040b · #304e04 · #044e46

Contrast

#21044e as textRatioAAAA largeAAAFix
Aaon white
17.62:1passpasspassPasses AAA — no fix needed.
Aaon black
1.19:1failfailfail
  • AA: use #904cf6 as the text (4.55:1)
  • AAA: use #ae7cf8 as the text (7.04:1)
  • AA: or shift the background to #828282 (4.58:1)
  • AAA: or shift the background to #a6a6a6 (7.24:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21044e as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#21044e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #21044e
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 #21044e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21044e-b19cc4-dfd34e-2b1f2d-e9eaf1?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