Red Color (#FF0000)
Red is a CSS named color defined as hex code #FF0000. Red is the pure red of the sRGB screen: the red channel at full strength with no green or blue. It is the most saturated red a display can show, which makes it a strong signal color.
Color Overview & Formats
redLuminance: 0.2126| Format | Syntax / Values | Notes | Action |
|---|---|---|---|
| HEX | #FF0000 | 6-digit hex web code | |
| RGB | rgb(255, 0, 0) | Red, Green, Blue channels (0-255) | |
| HSL | hsl(0, 100%, 50%) | Hue (0°), Saturation (100%), Lightness (50%) | |
| HSV / HSB | hsv(0, 100%, 100%) | Hue, Saturation (100%), Value/Brightness (100%) | |
| CMYK | cmyk(0%, 100%, 100%, 0%) | Digital mathematical approximation (non-print) | |
| OKLCH | oklch(0.628 0.258 29.2) | Perceptually uniform color space (CSS Color 4 approximation) |
background-color: #FF0000; /* or red */- Select color format: Choose the desired format (HEX #FF0000, RGB, or HSL).
- Copy the code: Click the copy button or press Tab+Enter to store in clipboard.
- Pair with black text: Black text on Red reaches 5.25:1 (WCAG AA).
What Colors Go With Red?
These 5 colors all go well with Red (#FF0000), and each one is a standard CSS named color. The ratio is the WCAG 2.2 contrast of that color on Red: 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 Red (HSL 0°). Each group offers full palette copy and live preview:
Complementary Harmony
Hue rotated 180 degrees on the HSL wheel (0° to 180°), keeping the original saturation and lightness.
Analogous Harmony
Hues 30 degrees either side (330° and 30°), keeping the original saturation and lightness.
Triadic Harmony
Hues spaced evenly by 120 degrees (120° and 240°), 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) | 5.25:1 | Pass | Pass | Fail |
Pure White (#FFFFFF) | 4.00:1 | Fail | Pass | Fail |
Dark Charcoal (#212529) | 3.86:1 | Fail | Pass | Fail |
Mid Gray (#666666) | 1.44:1 | 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.
Red Background Download
Download standard 1920x1080 solid desktop wallpaper or generate mobile wallpaper:
Standard Wallpaper: 1920x1080 PNG (#FF0000)Download Options
All wallpaper files precisely match the W3C standard color value:
CSS Standard & Usage Notes
red = #ff0000 (rgb(255, 0, 0))
UI Design & Accessibility Guidelines
Use it for error states, alerts, sale tags and warning icons, and keep it to small areas. On Red, black text passes WCAG AA at every size (5.25:1); white text passes only for large text (4:1).
Frequently Asked Questions (FAQ)
Can I use black text on Red?
Yes. Black text on Red has a WCAG 2.2 contrast ratio of 5.25:1, which passes AA (4.5:1) for all text sizes but not the stricter AAA level (7:1) for body text.
Can I use white text on Red?
Only for large text. White text on Red has a WCAG 2.2 contrast ratio of 4:1: enough for large text (3:1) but below the 4.5:1 needed for body text.
What colors go with Red?
Black, White, Gold, Navy and Ivory all go well with Red. Black (5.25:1) has enough contrast for text on Red; White, Gold, Navy and Ivory work better as a background or accent.
What is the hex code for red?
The CSS named color red is #FF0000, which is RGB(255, 0, 0). The short form #F00 is the same color.