#00A3DB

sRGB: 0 / 163 / 219

#00A3DB belongs to the azure family. Its hex code tells a screen to mix 0 red, 163 green and 219 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 195.3° lands in the azure region. Its 100.0% saturation makes it strong in color at this lightness. HSL lightness is 42.9% 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 (7.26:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 0, 163, 219
HSL: 195.34°, 100.00%, 42.94%
HSV / HSB: 195.34°, 100.00%, 85.88%
CMYK (approx.): 100.00%, 25.57%, 0.00%, 14.12%
CIE XYZ (D65, Y = 100 for white): 25.881, 31.307, 71.699
CIELAB (D65, 2° observer): 62.766, -15.427, -38.184
WCAG relative luminance: 0.31309
24-bit decimal: 41947

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 #00A3DB 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: 7.26:1

Normal text: AAA
Large text: AAA

White text: 2.89:1

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

#DB3800 sits half a turn (180°) from #00A3DB 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.

#00A3DB #DB3800

Analogous

#00DBA6 and #0035DB sit 30° to either side of #00A3DB. 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.

#00DBA6 #00A3DB #0035DB

Triadic

#00A3DB, #DB00A3 and #A3DB00 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#00A3DB #DB00A3 #A3DB00

Split complementary

Start at #00A3DB and look across the wheel. #DB0035 and #DBA600 sit 30° to either side of its exact opposite, giving you two different accent choices.

#00A3DB #DB0035 #DBA600

Square

Starting with #00A3DB, each quarter turn (90°) takes you to the next hue: #A600DB, #DB3800, then #35DB00. Across the square, #00A3DB pairs with #DB3800, and #A600DB with #35DB00.

#00A3DB #A600DB #DB3800 #35DB00

Tetradic

#00A3DB and #DB3800 are opposites, as are #3800DB and #A3DB00. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#00A3DB #3800DB #DB3800 #A3DB00

Tints

Mixing #00A3DB with white in 20% steps produces this scale. The first mixture, #33B5E2, keeps 80% of the original. By #CCEDF8, the mixture is 80% white.

#00A3DB #33B5E2 #66C8E9 #99DAF1 #CCEDF8 #FFFFFF

Shades

Mixing #00A3DB with black in 20% steps produces this scale. The first mixture, #0082AF, keeps 80% of the original. By #00212C, the mixture is 80% black.

#00A3DB #0082AF #006283 #004158 #00212C #000000

Tones

Mixing #00A3DB with middle gray in 20% steps produces this scale. The first mixture, #1A9CC9, keeps 80% of the original. By #668792, the mixture is 80% middle gray.

#00A3DB #1A9CC9 #3395B7 #4D8EA4 #668792 #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

#00A3DB

RGB

rgb(0 163 219)

HSL

hsl(195.342 100.000% 42.941%)

CSS example

.color-sample {
  background-color: #00A3DB;
  color: #000000;
}

Channel breakdown

RGB

#00A3DB uses 0 red, 163 green and 219 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 0.0%

Green 63.9%

Blue 85.9%

CMYK

A simple CMYK estimate for #00A3DB is 100.0% cyan, 25.6% magenta, 0.0% yellow and 14.1% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 100.0%

Magenta 25.6%

Yellow 0.0%

Black 14.1%

Nearby colors

The nearest shorthand match is #00AADD. Its matching digit pairs let you write it as #0AD in CSS. For a modern design, keep #00A3DB when you want an exact match. Use its web-safe neighbor, #0099CC, when matching a legacy palette of 216 colors.

Nearest shorthand: #00AADD Nearest web-safe: #0099CC

Gradient to complement

#00A3DB #2591B7 #497F92 #6E6E6E #925C49 #B74A25 #DB3800

Color vision previews

Compare how #00A3DB 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.

#87A1DE

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.

#6D90DA

Tritanopia

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

#00B2B6

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.

#6CA0DD

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.

#5E98DB

Tritanomaly (50%)

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

#00A7CE

Grayscale (luminance)

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

#989898

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.

#6E9EBD

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 0.00000 G 0.36625 B 0.70838

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 0.28283 G 0.62952 B 0.83870

Linear Display P3

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

R 0.06502 G 0.35410 B 0.67151

CIE xyY

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

x 0.201 y 0.243 Y 31.307

CMY

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

C % 100.000 M % 36.078 Y % 14.118

Binary RGB

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

00000000 10100011 11011011