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Fluorescent Yellow

أصفر فسفوري

Color codes

HEX
RGB
HSL
HSV
CMYK (approximate)
CIELAB
CSS
Relative luminance0.8436
Green Warm ColorsVivid & Neon Colors Warm

Shades of Fluorescent Yellow

All shades

Lighter

Darker

Tints mixed with white

Tones mixed with gray

Color harmonies

Complementary

Opposite on the wheel (180°): maximum contrast for accents.

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Analogous

Neighbors 30° apart: calm and natural.

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Triadic

Three hues 120° apart: vibrant yet balanced.

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Split-complementary

The base plus the two neighbors of its complement: contrast with less tension.

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Tetradic

Four hues 90° apart: rich, best with one dominant color.

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Monochromatic

One hue in several lightness levels: elegant and consistent.

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Contrast and readability

White text1.18:1
✗ AA✗ AAA✗ AA Large
Black text17.87:1
✓ AA✓ AAA✓ AA Large
On white1.18:1
✗ AA✗ AAA✗ AA Large
On black16.07:1
✓ AA✓ AAA✓ AA Large

Text colors that pass AA

Check in the contrast checker

In a design

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A short paragraph shows how body text sits next to the color.

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New

Cards and badges use a soft tint of the color. Read more

Plan your next project

A short paragraph shows how body text sits next to the color.

Get started
New

Cards and badges use a soft tint of the color.

Fluorescent Yellow

Full-color background with readable text.

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About Fluorescent Yellow

Fluorescent Yellow (#CCFF00) is a medium, highly saturated color from the Green family with a warm character. It is made of 204 red, 255 green and 0 blue (hsl(72, 100%, 50%)). Its contrast ratio is 1.18:1 against white and 17.87:1 against black, so dark text reads best on it.

Suggested uses

  • buttons, highlights and calls to action
  • logos and brand accents
  • designs that should feel energetic or welcoming

Reading the codes

In HEX, #CCFF00 stores red, green and blue as pairs of base-16 digits: 204, 255 and 0 out of 255. In HSL the same color has a hue of 72°, 100% saturation and 50% lightness, which makes lighter or darker variants easy to create by changing only the lightness.

Similar colors

#E3FF00Lemon Lime#A7FC00Spring Bud#ADFF2FGreen Yellow#D1E231Pear#FFFF33Neon Yellow#FFFF00Yellow#7FFF00Chartreuse#7CFC00Lawn Green#FFF44FLemon Yellow#FDFD96Pastel Yellow

Palettes with this color

Tropical Leaves#004B23 #007200 #38B000 #9EF01A #FFBE0BBold Primary#FF595E #FFCA3A #8AC926 #1982C4 #6A4C93Watermelon Sorbet#FF595E #FF924C #FDF0D5 #8AC926 #2B9348

Tools for this color

Shades GeneratorGenerate tints, tones, lighter and darker shades and saturation variations.Contrast CheckerAccurate WCAG contrast ratio with AA/AAA results and accessible suggestions.Color Harmony GeneratorComplementary, analogous, triadic, tetradic, split-complementary and monochromatic harmonies.Color Blindness SimulatorApproximate protanopia, deuteranopia, tritanopia and achromatopsia simulations.

Frequently asked questions

What is the HEX code of Fluorescent Yellow?
The HEX code of Fluorescent Yellow is #CCFF00. In RGB it is rgb(204, 255, 0) and in HSL hsl(72, 100%, 50%).
Which text color works on Fluorescent Yellow?
White text has a contrast ratio of 1.18:1 on Fluorescent Yellow and black text 17.87:1, so black text is more readable. WCAG AA needs at least 4.5:1 for normal text.
What is the complementary color of Fluorescent Yellow?
Rotating the hue of Fluorescent Yellow by 180° gives #3300FF, its complementary color on the RGB color wheel.
What is Fluorescent Yellow in CMYK?
An approximate CMYK value for Fluorescent Yellow is cmyk(20%, 0%, 100%, 0%). For printing, ask your printer for an ICC-profiled conversion.