Indigo Color (#4B0082)
Indigo is a CSS named color defined as hex code #4B0082. Indigo is a very dark, blue-leaning violet. Its blue channel is the strongest, with a smaller red part and no green.
Color Overview & Formats
indigoLuminance: 0.0311| Format | Syntax / Values | Notes | Action |
|---|---|---|---|
| HEX | #4B0082 | 6-digit hex web code | |
| RGB | rgb(75, 0, 130) | Red, Green, Blue channels (0-255) | |
| HSL | hsl(275, 100%, 25%) | Hue (275°), Saturation (100%), Lightness (25%) | |
| HSV / HSB | hsv(275, 100%, 51%) | Hue, Saturation (100%), Value/Brightness (51%) | |
| CMYK | cmyk(42%, 100%, 0%, 49%) | Digital mathematical approximation (non-print) | |
| OKLCH | oklch(0.339 0.179 301.7) | Perceptually uniform color space (CSS Color 4 approximation) |
background-color: #4B0082; /* or indigo */- Select color format: Choose the desired format (HEX #4B0082, RGB, or HSL).
- Copy the code: Click the copy button or press Tab+Enter to store in clipboard.
- Pair with white text: White text on Indigo reaches 12.95:1 (WCAG AAA).
What Colors Go With Indigo?
These 6 colors all go well with Indigo (#4B0082), and each one is a standard CSS named color. The ratio is the WCAG 2.2 contrast of that color on Indigo: at 4.5:1 or above it works for text; below that, use it for backgrounds and accents.
Harmonious Palettes & Tints
The palettes below are algorithmically generated across standard intervals based on Indigo (HSL 275°). Each group offers full palette copy and live preview:
Complementary Harmony
Hue rotated 180 degrees on the HSL wheel (275° to 95°), keeping the original saturation and lightness.
Analogous Harmony
Hues 30 degrees either side (245° and 305°), keeping the original saturation and lightness.
Triadic Harmony
Hues spaced evenly by 120 degrees (35° and 155°), keeping the original saturation and lightness.
Tints & Shades
Mixed with white (tints) and black (shades) in sRGB at 60% and 30%.
WCAG 2.2 Text Readability & Contrast Check
Under WCAG 2.2 criteria, regular body text requires at least 4.5:1 (AA) and large text requires at least 3.0:1. The table below displays calculated contrast ratios:
| Foreground Color | Contrast Ratio | Normal Text (AA) | Large Text (AA) | Normal Text AAA (>= 7.0:1) |
|---|---|---|---|---|
Pure Black (#000000) | 1.62:1 | Fail | Fail | Fail |
Pure White (#FFFFFF) | 12.95:1 | Pass | Pass | Pass |
Dark Charcoal (#212529) | 1.19:1 | Fail | Fail | Fail |
Mid Gray (#666666) | 2.26:1 | Fail | Fail | Fail |
Interactive Contrast Tester
Enter text foreground and background colors to verify WCAG legibility:
This is sample body text rendered directly to verify contrast and readability.
Indigo Background Download
Download standard 1920x1080 solid desktop wallpaper or generate mobile wallpaper:
Standard Wallpaper: 1920x1080 PNG (#4B0082)Download Options
All wallpaper files precisely match the W3C standard color value:
CSS Standard & Usage Notes
indigo = #4b0082 (rgb(75, 0, 130))
UI Design & Accessibility Guidelines
Use it for dark headers, footers, night and tech themes, and backgrounds behind light text. On Indigo, white text passes WCAG AAA at every size (12.95:1); black text fails even for large text (1.62:1).
Frequently Asked Questions (FAQ)
Can I use black text on Indigo?
No. Black text on Indigo has a WCAG 2.2 contrast ratio of only 1.62:1, below the 3:1 minimum even for large text.
Can I use white text on Indigo?
Yes. White text on Indigo has a WCAG 2.2 contrast ratio of 12.95:1, passing both AA (4.5:1) and AAA (7:1) at every text size.
What colors go with Indigo?
White, Gold, Lavender, Pink, Silver and Turquoise all go well with Indigo. White (12.95:1), Gold (9.23:1), Lavender (10.52:1), Pink (8.42:1), Silver (7.12:1) and Turquoise (7.89:1) have enough contrast for text on Indigo.
Is indigo purple or blue?
Indigo (#4B0082) has a hue of 275°, between blue (240°) and CSS purple (300°) and slightly closer to purple, so it reads as a very dark violet.