Aureolin
HEX: #FDEE00 | Modern Palette
Color Specifications
#FDEE00
253, 238, 0
56°, 100% ,49%
0, 6, 100, 1
About Aureolin
Aureolin (#FDEE00) is a color with RGB(253, 238, 0) and HSL(56.4°, 100%, 49.6%). It is commonly associated with Energetic, Bold moods. In design, it fits Vivid, Warm styles and is suitable for Text, Button, Accent. Its complementary color is #000FFD, which creates strong contrast. Its triadic palette includes #00FDEE and #EE00FD. The name comes from aureolus (Latin).
- HEX: #FDEE00
- RGB: 253, 238, 0
- HSL: 56.4°, 100%, 49.6%
- Mood: Energetic, Bold
- Style: Vivid, Warm
- Use case: Text, Button, Accent
- Complementary color: #000FFD
- Triadic colors: #00FDEE, #EE00FD
- The name comes from aureolus (Latin).
Live Components
Color Palettes
Color Harmonies
Complementary
The color directly opposite on the color wheel — creates maximum contrast and vibrance.
Analogous
Colors adjacent on the wheel — naturally harmonious and pleasing to the eye.
Triadic
Three colors equally spaced 120° apart — bold, balanced, and visually rich.
Split-Complementary
Two colors flanking the complement — high contrast with less tension than full complementary.
Tetradic (Square)
Four colors at 90° intervals — rich variety, best when one color dominates.
Monochromatic
Shades and tints of the same hue — cohesive, elegant, and easy to work with.
Shades & Tints
A seamless scale of #FDEE00 from deepest shade to lightest tint.
Frequently Asked Questions
Name, History & Etymology
History
Aureolin, also known as Cobalt Yellow, is a synthetic inorganic pigment. It was first prepared in 1848 by Nikolaus Wolfgang Fischer in Breslau, Germany, and introduced to artists' palettes around 1851. It quickly gained popularity among watercolorists and oil painters due to its transparent, bright yellow hue, which was a welcome addition to the limited range of stable yellow pigments available at the time. Before aureolin, many yellow pigments were either fugitive (faded over time) or toxic. Its chemical composition is potassium cobaltinitrite (K3[Co(NO2)6]).
First Recorded Use
1851
Cultural Associations
Aureolin was particularly favored by Impressionist and Post-Impressionist painters for its luminosity and transparency, making it ideal for capturing light effects and atmospheric qualities. Artists like Vincent van Gogh and Claude Monet are believed to have used aureolin in some of their works. However, over time, it was discovered that aureolin can be somewhat unstable, particularly in oil paints, where it can darken or turn greenish-yellow, especially when exposed to light or certain other pigments. This instability led to a decline in its use in the 20th century, though it is still available today, often with improved formulations.
Code Snippets
/* Background */
.element {
background-color: #FDEE00;
}
/* Text */
.element {
color: #FDEE00;
}
/* Border */
.element {
border: 1px solid #FDEE00;
}/* Linear gradient to complementary */
.element {
background: linear-gradient(
to right,
#FDEE00,
#000FFD
);
}
/* Radial gradient */
.element {
background: radial-gradient(
circle,
#FDEE00,
#000FFD
);
}// SCSS variable
$aureolin: #FDEE00;
// With RGB channels (useful for rgba() usage)
$aureolin-r: 253;
$aureolin-g: 238;
$aureolin-b: 0;
// Usage
.element {
background-color: $aureolin;
color: rgba($aureolin-r, $aureolin-g, $aureolin-b, 0.8);
}