Photo in the color Unmellow Yellow
Pictured: Unmellow Yellow
rgb(255, 255, 102)
#FFFF66

Laser Lemon #FFFF66 RGB Color Code

Also known as Unmellow Yellow

Web-safe color.

Laser Lemon (#FFFF66) is a vivid, very light yellow. In RGB it is made of 100% red, 100% green and 40% blue (R 255, G 255, B 102). The red channel is the strongest. In HSL it has a hue of 60°, 100% saturation and 70% lightness. Its relative luminance is 0.937, so black text is easier to read on top of it. For print, a rough CMYK match is 0% cyan, 0% magenta, 60% yellow and 0% black. Check it against your printer's ICC profile before you print. It is a warm color. It goes well with cool blues and greens for contrast. For a matching look, use nearby warm tones.

Open in color picker
ConverterPalette generatorContrast checkerGradient builderUI previewSimilar names

Laser Lemon color codes

#FFFF66 in every common color format. Click a value to copy it.

FormatValueNotesCopy
HEX #FFFF66 Valid CSS
RGB rgb(255, 255, 102) Valid CSS
HSL hsl(60, 100%, 70%) Valid CSS
HSV / HSB hsv(60, 60%, 100%) Not a CSS format
HWB hwb(60 40% 0%) Valid CSS
CMYK cmyk(0%, 0%, 60%, 0%) Approximate (no ICC profile)
OKLCH oklch(97.23% 0.1713 109.2) Valid CSS
OKLab oklab(97.23% -0.0564 0.1618) Valid CSS
CIELAB lab(97.93% -13.52 70.52) D50, as in CSS
CIELCH lch(97.93% 71.8 100.85) Valid CSS
Display P3 color(display-p3 1 1 0.4961) Valid CSS
XYZ (D65) color(xyz-d65 0.794 0.9374 0.2648) Valid CSS
Decimal 16777062 Integer (0xRRGGBB)

CMYK here is a rough screen match without an ICC profile. See CMYK and print. Relative luminance: 0.9374. Nearest web-safe color: #FFFF66.

Mix Laser Lemon with other colors

See what #FFFF66 makes with red paint, under a green light, printed with cyan ink and in a digital blend with blue. Click a picture to change the colors and amounts in the color mixer.

PaintLaser Lemon and red paintOpen in the color mixer
LightLaser Lemon and green lightOpen in the color mixer
PrintLaser Lemon and cyan inkOpen in the color mixer
DigitalLaser Lemon blended with blueOpen in the color mixer

Use Laser Lemon in your code

Ready to paste into CSS, Sass, Tailwind, iOS, Android and Flutter. Click the icon to copy a line.

WhereCodeCopy
CSS variable--laser-lemon: #FFFF66;
Sass variable$laser-lemon: #FFFF66;
Tailwind CSS v4@theme { --color-laser-lemon: #FFFF66; }
Tailwind CSS v3 configcolors: { 'laser-lemon': '#FFFF66' }
SwiftUIColor(red: 1, green: 1, blue: 0.4)
UIKitUIColor(red: 1, green: 1, blue: 0.4, alpha: 1)
Android XML<color name="laser_lemon">#FFFFFF66</color>
Flutter and Jetpack ComposeColor(0xFFFFFF66)

Accessibility and contrast

Black text works best on #FFFF66 (19.75:1, AAA). Here is how #FFFF66 does as a text color:

Large heading text
Body text at 16px. The quick brown fox jumps over the lazy dog.
1.06:1 on white
APCA Lc 0
Fails AATry #7C7B00
Large heading text
Body text at 16px. The quick brown fox jumps over the lazy dog.
19.75:1 on black
APCA Lc -103
AAA

Check this color against any background in the contrast checker. WCAG ratios and APCA Lc values measure different things, so one can't stand in for the other. Learn more.

How people with color blindness see Laser Lemon

#FFFF66 next to its complement and its two triadic colors, as seen with each type of color blindness.

  • Normal visionhow most people see it
  • Protanopiano red cones, about 1% of men
  • Deuteranopiano green cones, the most common type
  • Tritanopiano blue cones, very rare
  • Achromatopsiano color at all, very rare

#FFFF66 stays easy to tell apart from its complement and triadic colors for the common types of color blindness. Try your own colors in the color blindness simulator.

About the color Laser Lemon

A glowing crayon

Laser Lemon is a Crayola crayon. It was one of eight fluorescent crayons that Binney and Smith, the maker of Crayola, brought out in 1972. They were made to glow under black light. For its first 18 years this crayon was sold as Chartreuse. In 1990 Crayola renamed all eight fluorescent colors, and this one became Laser Lemon.

In 1992 the fluorescent crayons joined the big box of 96.

Which code is right

No screen can show a fluorescent glow, so every code for this crayon is a guess. The Wikipedia article on lemon gives #FFFF66, the code used here. The Wikipedia list of Crayola colors now gives a greener #E6FF66. To add to the mix, this site also shows Unmellow Yellow, a different Crayola fluorescent, with the same #FFFF66.

For other sharp yellows, see lemon yellow and electric lime.

Laser Lemon in a user interface

A sample app screen with #FFFF66 as the main color, on a light and a dark theme.

Light theme

Dark theme

Buttons and bars use #FFFF66 as it is. On the light theme, #FFFF66 is too hard to read as text (1.06:1), so links, the badge and outline text use #7C7B00 there (4.48:1). Build a full color scheme around it in the UI color preview.

Color harmonies for Laser Lemon

These schemes turn the hue of #FFFF66 around the color wheel. Each swatch links to its own page.

Complementary

Two colors on opposite sides of the wheel. This gives the most contrast.

Open palette
this#FFFF66#6666FF

Analogous

Hues that sit next to each other and look good together.

Open palette
#FFB366this#FFFF66#B3FF66

Triadic

Three hues spaced evenly around the wheel. Bold, but still balanced.

Open palette
this#FFFF66#66FFFF#FF66FF

Split complementary

A base color plus the two hues on each side of its opposite. Strong contrast that clashes less.

Open palette
this#FFFF66#66B3FF#B366FF

Tetradic (rectangle)

Two pairs of opposite colors. Let one color lead and use the others less.

Open palette
this#FFFF66#66FF66#6666FF#FF66FF

Square

Four hues 90° apart, spread evenly around the wheel.

Open palette
this#FFFF66#66FFB3#6666FF#FF66B3

Monochromatic

One hue at different levels of lightness and saturation.

Open palette
#666600#B9B900#FFFF0D#FFFF60#FFFFB3

Gradients with Laser Lemon

Four CSS gradients made from #FFFF66. Copy the code, or open one in the gradient generator to change it.

Soft tint

From a pale tint to the full color.

background: linear-gradient(90deg, #FEFFEB, #FFFF66);

Edit in the gradient generator

Deep shade

The color fading into a dark shade.

background: linear-gradient(180deg, #FFFF66, #484817);

Edit in the gradient generator

Analogous

Its two neighbors on the color wheel.

background: linear-gradient(135deg, #FFB366, #FFFF66, #B3FF66);

Edit in the gradient generator

Triadic

A bold blend with a triadic color, through a clean middle.

background: linear-gradient(135deg, #FFFF66, #C2FFC2, #66FFFF);

Edit in the gradient generator

Shades, tints and tones of Laser Lemon

Shades are darker, tints are lighter and tones are grayer. We make them in OKLCH so the steps look even. Hover a step to see its code, or click it to open it.

Design system scale (50 to 950)

Laser Lemon sits at step 50. Export the full scale as CSS variables or Tailwind tokens from the picker.

  1. 50
    FFFF66
  2. 100
    F0F2B5
  3. 200
    E0E18B
  4. 300
    C8C851
  5. 400
    ABAA00
  6. 500
    8D8C00
  7. 600
    717000
  8. 700
    5A5900
  9. 800
    464500
  10. 900
    333300
  11. 950
    1F1F00

Closest RAL, Tailwind and CSS colors

The nearest match to #FFFF66 in three color systems that designers and builders use.

RAL ClassicRAL 1026 Luminous yellow#FFFF00, very close (ΔE 4.0)Tailwind CSSyellow-200 #FEF08A, close (ΔE 5.8)CSS color namesyellow #FFFF00, very close (ΔE 4.0)

ΔE is the distance in OKLab: under 2 is hard to see, over 10 is a clearly different color. Browse all RAL colors, the Tailwind palette or the 148 CSS color names. RAL values on screens are only a guide, so check a real color chart before you order paint.

The named colors that look closest to this one (ΔE in OKLab). Browse all shades of yellow or search the color library.