#B2DDFF

sRGB: 178 / 221 / 255

Ancient mountains drift beyond memory
Electric visions illuminate forgotten empires
Celestial symphonies echo beyond eternity

#B2DDFF belongs to the azure family. Its hex code tells a screen to mix 178 red, 221 green and 255 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 206.5° lands in the azure region. Its 100.0% saturation makes it strong in color at this lightness. HSL lightness is 84.9% 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 (14.68:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 178, 221, 255
HSL: 206.49°, 100.00%, 84.90%
HSV / HSB: 206.49°, 30.20%, 100.00%
CMYK (approx.): 30.20%, 13.33%, 0.00%, 0.00%
CIE XYZ (D65, Y = 100 for white): 62.263, 68.397, 104.532
CIELAB (D65, 2° observer): 86.204, -6.290, -21.072
WCAG relative luminance: 0.68398
24-bit decimal: 11722239

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 #B2DDFF 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: 14.68:1

Normal text: AAA
Large text: AAA

White text: 1.43:1

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

#FFD4B2 sits half a turn (180°) from #B2DDFF 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.

#B2DDFF #FFD4B2

Analogous

#B2FFFB and #B2B6FF sit 30° to either side of #B2DDFF. 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.

#B2FFFB #B2DDFF #B2B6FF

Triadic

#B2DDFF, #FFB2DD and #DDFFB2 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#B2DDFF #FFB2DD #DDFFB2

Split complementary

Start at #B2DDFF and look across the wheel. #FFB2B6 and #FFFBB2 sit 30° to either side of its exact opposite, giving you two different accent choices.

#B2DDFF #FFB2B6 #FFFBB2

Square

Starting with #B2DDFF, each quarter turn (90°) takes you to the next hue: #FBB2FF, #FFD4B2, then #B6FFB2. Across the square, #B2DDFF pairs with #FFD4B2, and #FBB2FF with #B6FFB2.

#B2DDFF #FBB2FF #FFD4B2 #B6FFB2

Tetradic

#B2DDFF and #FFD4B2 are opposites, as are #D4B2FF and #DDFFB2. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#B2DDFF #D4B2FF #FFD4B2 #DDFFB2

Tints

Mixing #B2DDFF with white in 20% steps produces this scale. The first mixture, #C1E4FF, keeps 80% of the original. By #F0F8FF, the mixture is 80% white.

#B2DDFF #C1E4FF #D1EBFF #E0F1FF #F0F8FF #FFFFFF

Shades

Mixing #B2DDFF with black in 20% steps produces this scale. The first mixture, #8EB1CC, keeps 80% of the original. By #242C33, the mixture is 80% black.

#B2DDFF #8EB1CC #6B8599 #475866 #242C33 #000000

Tones

Mixing #B2DDFF with middle gray in 20% steps produces this scale. The first mixture, #A8CAE6, keeps 80% of the original. By #8A9399, the mixture is 80% middle gray.

#B2DDFF #A8CAE6 #9EB8CC #94A5B3 #8A9399 #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

#B2DDFF

RGB

rgb(178 221 255)

HSL

hsl(206.494 100.000% 84.902%)

CSS example

.color-sample {
  background-color: #B2DDFF;
  color: #000000;
}

Channel breakdown

RGB

#B2DDFF uses 178 red, 221 green and 255 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 69.8%

Green 86.7%

Blue 100.0%

CMYK

A simple CMYK estimate for #B2DDFF is 30.2% cyan, 13.3% magenta, 0.0% yellow and 0.0% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 30.2%

Magenta 13.3%

Yellow 0.0%

Black 0.0%

Nearby colors

The nearest shorthand match is #AADDFF. Its matching digit pairs let you write it as #ADF in CSS. For a modern design, keep #B2DDFF when you want an exact match. Use its web-safe neighbor, #99CCFF, when matching a legacy palette of 216 colors.

Nearest shorthand: #AADDFF Nearest web-safe: #99CCFF

Gradient to complement

#B2DDFF #BFDCF2 #CCDAE5 #D9D9D9 #E5D7CC #F2D6BF #FFD4B2

Color vision previews

Compare how #B2DDFF 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.

#CFDCFF

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.

#C5D4FE

Tritanopia

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

#9AE5E8

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.

#C5DCFF

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.

#C0D7FF

Tritanomaly (50%)

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

#AFDFF7

Grayscale (luminance)

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

#D8D8D8

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.

#C6DAEC

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 0.44520 G 0.72306 B 1.00000

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 0.73174 G 0.86175 B 0.98691

Linear Display P3

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

R 0.49453 G 0.71383 B 0.97047

CIE xyY

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

x 0.265 y 0.291 Y 68.397

CMY

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

C % 30.196 M % 13.333 Y % 0.000

Binary RGB

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

10110010 11011101 11111111