#00A5DA

sRGB: 0 / 165 / 218

#00A5DA belongs to the cyan family. Its hex code tells a screen to mix 0 red, 165 green and 218 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 194.6° lands in the cyan region. Its 100.0% saturation makes it strong in color at this lightness. HSL lightness is 42.7% 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 (7.39:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 0, 165, 218
HSL: 194.59°, 100.00%, 42.75%
HSV / HSB: 194.59°, 100.00%, 85.49%
CMYK (approx.): 100.00%, 24.31%, 0.00%, 14.51%
CIE XYZ (D65, Y = 100 for white): 26.108, 31.971, 71.127
CIELAB (D65, 2° observer): 63.318, -16.864, -36.767
WCAG relative luminance: 0.31972
24-bit decimal: 42458

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 #00A5DA 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: 7.39:1

Normal text: AAA
Large text: AAA

White text: 2.84:1

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

#DA3500 sits half a turn (180°) from #00A5DA 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.

#00A5DA #DA3500

Analogous

#00DAA2 and #0038DA sit 30° to either side of #00A5DA. 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.

#00DAA2 #00A5DA #0038DA

Triadic

#00A5DA, #DA00A5 and #A5DA00 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#00A5DA #DA00A5 #A5DA00

Split complementary

Start at #00A5DA and look across the wheel. #DA0038 and #DAA200 sit 30° to either side of its exact opposite, giving you two different accent choices.

#00A5DA #DA0038 #DAA200

Square

Starting with #00A5DA, each quarter turn (90°) takes you to the next hue: #A200DA, #DA3500, then #38DA00. Across the square, #00A5DA pairs with #DA3500, and #A200DA with #38DA00.

#00A5DA #A200DA #DA3500 #38DA00

Tetradic

#00A5DA and #DA3500 are opposites, as are #3500DA and #A5DA00. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#00A5DA #3500DA #DA3500 #A5DA00

Tints

Mixing #00A5DA with white in 20% steps produces this scale. The first mixture, #33B7E1, keeps 80% of the original. By #CCEDF8, the mixture is 80% white.

#00A5DA #33B7E1 #66C9E9 #99DBF0 #CCEDF8 #FFFFFF

Shades

Mixing #00A5DA with black in 20% steps produces this scale. The first mixture, #0084AE, keeps 80% of the original. By #00212C, the mixture is 80% black.

#00A5DA #0084AE #006383 #004257 #00212C #000000

Tones

Mixing #00A5DA with middle gray in 20% steps produces this scale. The first mixture, #1A9EC8, keeps 80% of the original. By #668792, the mixture is 80% middle gray.

#00A5DA #1A9EC8 #3396B6 #4D8FA4 #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

#00A5DA

RGB

rgb(0 165 218)

HSL

hsl(194.587 100.000% 42.745%)

CSS example

.color-sample {
  background-color: #00A5DA;
  color: #000000;
}

Channel breakdown

RGB

#00A5DA uses 0 red, 165 green and 218 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 0.0%

Green 64.7%

Blue 85.5%

CMYK

A simple CMYK estimate for #00A5DA is 100.0% cyan, 24.3% magenta, 0.0% yellow and 14.5% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 100.0%

Magenta 24.3%

Yellow 0.0%

Black 14.5%

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 #00A5DA 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

#00A5DA #2492B6 #498091 #6D6D6D #915A49 #B64824 #DA3500

Color vision previews

Compare how #00A5DA 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.

#8AA3DD

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.

#7192D9

Tritanopia

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

#00B4B7

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.

#6FA2DB

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.

#6199DA

Tritanomaly (50%)

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

#00A8CE

Grayscale (luminance)

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

#999999

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.

#6F9FBD

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 0.37626 B 0.70110

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 0.28665 G 0.63725 B 0.83542

Linear Display P3

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

R 0.06680 G 0.36377 B 0.66561

CIE xyY

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

x 0.202 y 0.247 Y 31.971

CMY

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

C % 100.000 M % 35.294 Y % 14.510

Binary RGB

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

00000000 10100101 11011010