Convert RGB color values to hexadecimal color codes for CSS and HTML. Enter red, green, and blue values to get the hex code.
The RGB to Hex Converter takes decimal red, green, and blue values (0–255) and converts them to a hexadecimal color code (#RRGGBB) for use in CSS, HTML, and design tools. Enter your RGB values and get the hex code instantly with a live color preview.
RGB values are the natural way to describe colors in programming — they map directly to the three light channels your screen uses. However, CSS shorthand and design tools often prefer hex notation for its brevity. Converting rgb(52, 152, 219) to #3498DB by hand requires converting each decimal value to a two-digit hex number.
This converter handles the math instantly and validates that your values are in the valid range (0–255). It also shows the CSS rgb() format for copy-pasting into stylesheets.
Quantifying this parameter enables meaningful comparison across time periods and projects, revealing trends that inform better decisions about personal productivity and resource management.
Design tools often output RGB values, but CSS, brand guides, and style systems typically use hex codes. This converter bridges the gap instantly with a live preview. Precise quantification supports meaningful goal-setting and accountability, ensuring that improvement efforts are focused on areas with the greatest potential impact on output. Data-driven tracking enables proactive schedule management, helping professionals protect focused work time and reduce the cognitive overhead of constant task-switching throughout the day.
hex = "#" + R.toString(16).padStart(2, "0") + G.toString(16).padStart(2, "0") + B.toString(16).padStart(2, "0") Each value is converted from decimal (0–255) to a two-digit hexadecimal string (00–FF).
Result: #2ECC71
R=46 → 0x2E, G=204 → 0xCC, B=113 → 0x71. Combined: #2ECC71. This is the "Emerald" green from the Flat UI Colors palette. In CSS: rgb(46, 204, 113).
Converting RGB to hex is a simple base conversion repeated three times. Each RGB channel (0–255 in decimal) becomes a two-character hexadecimal string (00–FF). The three pairs are concatenated with a # prefix to form the standard CSS hex color notation.
Hex is preferred for static, known colors in CSS and style guides due to brevity. RGB (and rgba for transparency) is preferred for dynamic colors computed in JavaScript, where channel manipulation is needed. Both produce identical results in browsers.
The hex or RGB code defines a color in the sRGB color space. How that color appears on screen depends on the display's color gamut, brightness, and calibration. For critical color work (branding, print production), use color-managed workflows with calibrated monitors.
Convert each decimal value (0–255) to hexadecimal (00–FF). For R=46: 46 ÷ 16 = 2 remainder 14. 2 = "2", 14 = "E", so 46 = "2E". Concatenate R+G+B hex pairs with a # prefix.
White is RGB(255, 255, 255) = #FFFFFF. Black is RGB(0, 0, 0) = #000000. All channels at maximum produces white light; all at zero produces black.
No. Each RGB channel is an 8-bit unsigned integer, limited to 0–255. Values outside this range are invalid in standard CSS. Some HDR color spaces use wider ranges, but standard web colors are 8-bit per channel.
Both are valid in CSS and produce the same color. Convention varies: some style guides prefer lowercase (#2ecc71) for readability, others prefer uppercase (#2ECC71). Be consistent within your project.
Append two hex digits for the alpha channel: #2ECC71CC. CC hex = 204 decimal = 80% opacity. FF = fully opaque, 00 = fully transparent. Alternatively, use rgba() in CSS.
This usually happens due to color space differences (sRGB vs. Display P3), rounding in floating-point calculations, or different color profiles. For web colors, always work in sRGB and ensure consistent rounding.