CSS color

indigo

#4b0082

hex#4b0082

rgbrgb(75, 0, 130)

hslhsl(275, 100%, 25%)

oklchoklch(0.339 0.179 301.7)

Relative luminance 0.0311

Cool Vivid Dark Technical Modern Luxury Bold

Open in palette tool Check contrast

Indigo on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the curated palettes it appears in and any public brand that adopts it.

Tints & shades

Tints — toward white

5f00a3 7700cc 8c00f0 9d14ff ae3dff bd61ff cc85ff dba8ff ecd1ff fbf5ff

Shades — toward black

440075 3e006b 390061 330057 2d004d 24003d 1e0033 180029 12001f 0c0014

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

Harmonies

Complementary

Open in tool →

4b0082 358000

#358000

Analogous

Open in tool →

4b0082 0b0080 800075

#0b0080 · #800075

Triadic

Open in tool →

4b0082 804a00 00804a

#804a00 · #00804a

Split-complementary

Open in tool →

4b0082 758000 00800b

#758000 · #00800b

Tetradic

Open in tool →

4b0082 800b00 358000 007580

#800b00 · #358000 · #007580

Contrast

indigo as text	Ratio	AA	AA large	AAA	Fix
Aaon white	12.95:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.62:1	fail	fail	fail	AA: use #aa33ff as the text (4.63:1) AAA: use #c370ff as the text (7.08:1) AA: or shift the background to #999999 (4.55:1) AAA: or shift the background to #bfbfbf (7.04:1)

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

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

Technical fonts →Modern fonts →Luxury fonts →Bold fonts →

mcpConnect your agent — build around indigo

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 #4b0082 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4b0082-b89cc4-c0cb62-2d1f2d-eae9f1?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