#FBE621

sRGB: 251 / 230 / 33

Cosmic tempests rise against oblivion
Immortal legends blossom beneath falling stars
Distant echoes surrender to silence

#FBE621 belongs to the yellow family. Its hex code tells a screen to mix 251 red, 230 green and 33 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 54.2° lands in the yellow region. Its 96.5% saturation makes it strong in color at this lightness. HSL lightness is 55.7% 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 (16.44:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 251, 230, 33
HSL: 54.22°, 96.46%, 55.69%
HSV / HSB: 54.22°, 86.85%, 98.43%
CMYK (approx.): 0.00%, 8.37%, 86.85%, 1.57%
CIE XYZ (D65, Y = 100 for white): 68.353, 77.214, 12.742
CIELAB (D65, 2° observer): 90.420, -10.741, 85.662
WCAG relative luminance: 0.77213
24-bit decimal: 16508449

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 #FBE621 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: 16.44:1

Normal text: AAA
Large text: AAA

White text: 1.28:1

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.

Reference: 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

#2136FB sits half a turn (180°) from #FBE621 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.

#FBE621 #2136FB

Analogous

#FB7921 and #A3FB21 sit 30° to either side of #FBE621. 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.

#FB7921 #FBE621 #A3FB21

Triadic

#FBE621, #21FBE6 and #E621FB are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#FBE621 #21FBE6 #E621FB

Split complementary

Start at #FBE621 and look across the wheel. #21A3FB and #7921FB sit 30° to either side of its exact opposite, giving you two different accent choices.

#FBE621 #21A3FB #7921FB

Square

Starting with #FBE621, each quarter turn (90°) takes you to the next hue: #21FB79, #2136FB, then #FB21A3. Across the square, #FBE621 pairs with #2136FB, and #21FB79 with #FB21A3.

#FBE621 #21FB79 #2136FB #FB21A3

Tetradic

#FBE621 and #2136FB are opposites, as are #36FB21 and #E621FB. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#FBE621 #36FB21 #2136FB #E621FB

Tints

Mixing #FBE621 with white in 20% steps produces this scale. The first mixture, #FCEB4D, keeps 80% of the original. By #FEFAD3, the mixture is 80% white.

#FBE621 #FCEB4D #FDF07A #FDF5A6 #FEFAD3 #FFFFFF

Shades

Mixing #FBE621 with black in 20% steps produces this scale. The first mixture, #C9B81A, keeps 80% of the original. By #322E07, the mixture is 80% black.

#FBE621 #C9B81A #978A14 #645C0D #322E07 #000000

Tones

Mixing #FBE621 with middle gray in 20% steps produces this scale. The first mixture, #E2D234, keeps 80% of the original. By #99946D, the mixture is 80% middle gray.

#FBE621 #E2D234 #CABD47 #B1A95A #99946D #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

#FBE621

RGB

rgb(251 230 33)

HSL

hsl(54.220 96.460% 55.686%)

CSS example

.color-sample {
  background-color: #FBE621;
  color: #000000;
}

Channel breakdown

RGB

#FBE621 uses 251 red, 230 green and 33 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 98.4%

Green 90.2%

Blue 12.9%

CMYK

A simple CMYK estimate for #FBE621 is 0.0% cyan, 8.4% magenta, 86.9% yellow and 1.6% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 0.0%

Magenta 8.4%

Yellow 86.9%

Black 1.6%

Nearby colors

The nearest shorthand match is #FFEE22. Its matching digit pairs let you write it as #FE2 in CSS. For a modern design, keep #FBE621 when you want an exact match. Use its web-safe neighbor, #FFFF33, when matching a legacy palette of 216 colors.

Nearest shorthand: #FFEE22 Nearest web-safe: #FFFF33

Gradient to complement

#FBE621 #D7C945 #B2AB6A #8E8E8E #6A71B2 #4553D7 #2136FB

Color vision previews

Compare how #FBE621 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.

#FCDE00

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.

#FFE836

Tritanopia

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

#FFD5C5

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.

#FCE200

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.

#FFE62D

Tritanomaly (50%)

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

#FFE180

Grayscale (luminance)

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

#E4E4E4

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.

#F0E5A8

Reference: National Eye Institute: Types of Color Vision Deficiency

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 0.96469 G 0.79130 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 0.97036 G 0.90485 B 0.32753

Linear Display P3

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

R 0.93390 G 0.79705 B 0.08761

CIE xyY

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

x 0.432 y 0.488 Y 77.214

CMY

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

C % 1.569 M % 9.804 Y % 87.059

Binary RGB

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

11111011 11100110 00100001