#C1FD21

sRGB · 193 / 253 / 33

#C1FD21 belongs to the yellow-green family. Its hex code tells a screen to mix 193 red, 253 green and 33 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 76.4° lands in the yellow-green region. Its 98.2% saturation makes it strong in color at this lightness. HSL lightness is 56.1% on a scale from black (0%) to white (100%). Of black and white lettering, black has the clearer light-to-dark separation on this background (17.34:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 193, 253, 33
HSL: 76.36°, 98.21%, 56.08%
HSV / HSB: 76.36°, 86.96%, 99.22%
CMYK (approx.): 23.72%, 0.00%, 86.96%, 0.78%
CIE XYZ (D65, Y = 100 for white): 57.390, 81.697, 14.184
CIELAB (D65, 2° observer): 92.441, -44.809, 85.588
WCAG relative luminance: 0.81698
24-bit decimal: 12713249

CMYK uses a profile-free approximation. Printed output depends on the press, ink and paper. Lab uses a D65 white point.

Text contrast

Contrast tells you how clearly lettering separates from #C1FD21 in light and dark. The ratio compares relative luminance, a measure of light weighted for human vision. Identical colors give 1:1 and black against white gives 21:1. A ratio of 2.99:1 falls just below the 3:1 AA minimum for large text. Body text needs at least 4.5:1 because its finer strokes are harder to distinguish.

Black text · 17.34:1

Normal text: AAA
Large text: AAA

White text · 1.21:1

Normal text: Fail
Large text: Fail

AA and AAA are WCAG accessibility levels. AAA sets a higher bar: 7:1 for normal text and 4.5:1 for large text. Large text begins at 18 pt regular or 14 pt bold. Ratings use the unrounded ratio. WCAG text contrast guidance

Palettes & scales

Harmonies rotate the hue. Scales mix the starting color with white, black or middle gray in 20% steps in encoded sRGB.

Complementary

#5D21FD sits half a turn (180°) from #C1FD21 on the HSL wheel. Keeping saturation and lightness steady while crossing to the opposite hue gives you a contrasting accent. Check text contrast separately before using the pair for lettering.

#C1FD21 #5D21FD

Analogous

#FDCB21 and #53FD21 sit 30° to either side of #C1FD21. The three hues are neighbors on the wheel, so you can change the color of a border or highlight while keeping it close to the original.

#FDCB21 #C1FD21 #53FD21

Triadic

#C1FD21, #21C1FD and #FD21C1 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#C1FD21 #21C1FD #FD21C1

Split complementary

Start at #C1FD21 and look across the wheel. #2153FD and #CB21FD sit 30° to either side of its exact opposite, giving you two different accent choices.

#C1FD21 #2153FD #CB21FD

Square

Starting with #C1FD21, each quarter turn (90°) takes you to the next hue: #21FDCB, #5D21FD, then #FD2153. Across the square, #C1FD21 pairs with #5D21FD, and #21FDCB with #FD2153.

#C1FD21 #21FDCB #5D21FD #FD2153

Tetradic

#C1FD21 and #5D21FD are opposites, as are #21FD5D and #FD21C1. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#C1FD21 #21FD5D #5D21FD #FD21C1

Tints

Mixing #C1FD21 with white in 20% steps produces this scale. The first mixture, #CDFD4D, keeps 80% of the original. By #F3FFD3, the mixture is 80% white.

#C1FD21 #CDFD4D #DAFE7A #E6FEA6 #F3FFD3 #FFFFFF

Shades

Mixing #C1FD21 with black in 20% steps produces this scale. The first mixture, #9ACA1A, keeps 80% of the original. By #273307, the mixture is 80% black.

#C1FD21 #9ACA1A #749814 #4D650D #273307 #000000

Tones

Mixing #C1FD21 with middle gray in 20% steps produces this scale. The first mixture, #B4E434, keeps 80% of the original. By #8D996D, the mixture is 80% middle gray.

#C1FD21 #B4E434 #A7CB47 #9AB25A #8D996D #808080

Copy color codes

Hex, RGB and HSL are three ways to write this screen color. Paste any of them into a CSS color property.

Hex

#C1FD21

RGB

rgb(193 253 33)

HSL

hsl(76.364 98.214% 56.078%)

CSS example

.color-sample {
  background-color: #C1FD21;
  color: #000000;
}

Channel breakdown

RGB

#C1FD21 uses 193 red, 253 green and 33 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 75.7%

Green 99.2%

Blue 12.9%

CMYK

A simple CMYK estimate for #C1FD21 is 23.7% cyan, 0.0% magenta, 87.0% yellow and 0.8% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 23.7%

Magenta 0.0%

Yellow 87.0%

Black 0.8%

Nearby colors

The nearest shorthand match is #BBFF22. Its matching digit pairs let you write it as #BF2 in CSS. For a modern design, keep #C1FD21 when you want an exact match. Use its web-safe neighbor, #CCFF33, when matching a legacy palette of 216 colors.

Nearest shorthand · #BBFF22 Nearest web-safe · #CCFF33

Gradient to complement

#C1FD21 #B0D846 #A0B46A #8F8F8F #7E6AB4 #6E46D8 #5D21FD

Color vision previews

Compare how #C1FD21 appears in each simulation. When two chart lines or status indicators become hard to tell apart, a label, shape or line pattern gives readers another way to distinguish them. Individual perception varies.

Protanopia

A red–green color vision deficiency. Without a distinct response from long-wavelength cones, some reds and greens can look alike, and reds can appear darker.

#FFEC00

Deuteranopia

A red–green color vision deficiency. Without a distinct response from medium-wavelength cones, some greens can be difficult to distinguish from reds or browns.

#FFE840

Tritanopia

A blue–yellow color vision deficiency. Without a distinct response from short-wavelength cones, blue can resemble green, and yellow can resemble pink.

#CAF0D8

Protanomaly (50%)

An altered long-wavelength cone response can make reds appear dimmer and harder to distinguish from greens. This swatch shows the model’s halfway setting.

#F5F100

Deuteranomaly (50%)

An altered medium-wavelength cone response can reduce the visible difference between reds and greens. This swatch shows the model’s halfway setting.

#F2EF35

Tritanomaly (50%)

An altered short-wavelength cone response can make blue harder to distinguish from green. This swatch shows the model’s halfway setting.

#C7F88B

Grayscale (luminance)

This design check removes hue and preserves relative luminance so you can compare light and dark areas.

#E9E9E9

Partial grayscale (50% blend)

This design check mixes the original color halfway toward its grayscale equivalent in linear light. Use it to see how a design holds up as color fades.

#D6F3AD

Technical reference

CAM16 and CIECAM02 below assume D65 white, an average surround, background Y of 20 against white at 100, and adapting luminance of 4.07 cd/m².

Linear sRGB

These channels scale with emitted light. Use them for lighting calculations and physically meaningful blends.

R 0.53328 G 0.98225 B 0.01521

Display P3

P3 displays can reproduce a wider range of reds and greens. These coordinates reproduce this same sRGB swatch on a color-managed P3 display.

R 0.80538 G 0.98551 B 0.33902

Linear Display P3

These P3 channels are proportional to light, before display encoding.

R 0.61299 G 0.96735 B 0.09407

CIE xyY

The x and y coordinates locate chromaticity on a diagram. Y gives relative luminance on a scale where white is 100.

x 0.374 y 0.533 Y 81.697

CMY

Ideal cyan, magenta and yellow are the complements of the encoded red, green and blue channels.

C % 24.314 M % 0.784 Y % 87.059

Binary RGB

Each eight-bit group represents one channel. Together they store the 24-bit hex color.

11000001 11111101 00100001