Sulfur yellow RAL 1016
Color values
HEX #EDFF21
RGB 237, 255, 33
HSL 65°, 100%, 56%
Series Yellows & Beiges
All formats
HEX #EDFF21
RGB rgb(237, 255, 33)
HSL hsl(65, 100%, 56%)
CSS var --color: #EDFF21;
RAL RAL 1016
Color analysis
Temperature Cool
Luminance 90%
Saturation 100%
Brightness 100%
WCAG accessibility
On white background
Aa — The quick brown fox jumps over the lazy dog
1.11:1
AA Fail
AA large Fail
AAA Fail
AAA large Fail
On black background
Aa — The quick brown fox jumps over the lazy dog
18.93:1
AA Pass
AA large Pass
AAA Pass
AAA large Pass
Tint & shade scale
Use this color in other tools
Where it's used
A sharp, acidic yellow used in chemical signage, industrial drum markings, and hazard identification. Essential contrast color alongside RAL 9005 in safety codes.
About this color
RAL 1016 Sulfur yellow is a RAL Classic color with HEX value #EDFF21, RGB(237, 255, 33), HSL(65°, 100%, 56%). It belongs to the Yellows & Beiges family (RAL 1xxx series). WCAG relative luminance: 90%. Contrast on white: 1.11:1. Contrast on black: 18.93:1.
FAQ
RAL 1016 Sulfur yellow is a standardized color from the RAL Classic palette, used in industry, architecture, and design for consistent color communication. Its HEX value is #EDFF21, equivalent to RGB(237, 255, 33).
The HEX code of RAL 1016 Sulfur yellow is #EDFF21. In CSS you can use it directly: color: #EDFF21; or background-color: #EDFF21;. Its RGB equivalent is rgb(237, 255, 33) and HSL is hsl(65, 100%, 56%).
RAL codes (e.g. RAL 1016) are physical paint standards created for industrial use — they define exact pigment formulations. HEX codes (e.g. #EDFF21) are digital representations for screens. The conversion is approximate: the same HEX can look different on screens vs. painted surfaces due to lighting, texture, and pigment variance.
WCAG contrast ratio compares the relative luminance of two colors: (L1+0.05)/(L2+0.05), where L is calculated from linearized RGB values. RAL 1016 Sulfur yellow has a relative luminance of 90%, giving a contrast of 1.11:1 on white and 18.93:1 on black. AA requires ≥4.5:1 for normal text.
The HEX value #EDFF21 is the closest digital approximation of RAL 1016 Sulfur yellow, but not an exact physical match. RAL colors are defined by spectrophotometric measurements of physical paint samples. On-screen rendering depends on your monitor calibration, color profile, and ambient lighting.
RAL 1016 Sulfur yellow (HEX #EDFF21) is used in industrial coatings, architectural finishes, signage, and product design wherever yellows & beiges tones are needed. RAL Classic codes are the standard reference in European manufacturing, construction, and powder coating industries.
RAL Classic contains 215 standardized colors organized into 9 series by hue family: yellows/beiges (1xxx), oranges (2xxx), reds (3xxx), violets (4xxx), blues (5xxx), greens (6xxx), greys (7xxx), browns (8xxx), and whites/blacks (9xxx). RAL 1016 belongs to the Yellows & Beiges family.