#319FAB

sRGB: 49 / 159 / 171

#319FAB belongs to the cyan family. Its hex code tells a screen to mix 49 red, 159 green and 171 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 185.9° lands in the cyan region. Its 55.5% saturation makes it partway between gray and the most vivid version of this hue at this lightness. HSL lightness is 43.1% 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 (6.68:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 49, 159, 171
HSL: 185.90°, 55.45%, 43.14%
HSV / HSB: 185.90°, 71.35%, 67.06%
CMYK (approx.): 71.35%, 7.02%, 0.00%, 32.94%
CIE XYZ (D65, Y = 100 for white): 21.014, 28.388, 42.901
CIELAB (D65, 2° observer): 60.238, -26.271, -15.168
WCAG relative luminance: 0.28390
24-bit decimal: 3252139

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 #319FAB 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: 6.68:1

Normal text: AA
Large text: AAA

White text: 3.14:1

Normal text: Fail
Large text: AA

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

#AB3D31 sits half a turn (180°) from #319FAB 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.

#319FAB #AB3D31

Analogous

#31AB7A and #3162AB sit 30° to either side of #319FAB. 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.

#31AB7A #319FAB #3162AB

Triadic

#319FAB, #AB319F and #9FAB31 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#319FAB #AB319F #9FAB31

Split complementary

Start at #319FAB and look across the wheel. #AB3162 and #AB7A31 sit 30° to either side of its exact opposite, giving you two different accent choices.

#319FAB #AB3162 #AB7A31

Square

Starting with #319FAB, each quarter turn (90°) takes you to the next hue: #7A31AB, #AB3D31, then #62AB31. Across the square, #319FAB pairs with #AB3D31, and #7A31AB with #62AB31.

#319FAB #7A31AB #AB3D31 #62AB31

Tetradic

#319FAB and #AB3D31 are opposites, as are #3D31AB and #9FAB31. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#319FAB #3D31AB #AB3D31 #9FAB31

Tints

Mixing #319FAB with white in 20% steps produces this scale. The first mixture, #5AB2BC, keeps 80% of the original. By #D6ECEE, the mixture is 80% white.

#319FAB #5AB2BC #83C5CD #ADD9DD #D6ECEE #FFFFFF

Shades

Mixing #319FAB with black in 20% steps produces this scale. The first mixture, #277F89, keeps 80% of the original. By #0A2022, the mixture is 80% black.

#319FAB #277F89 #1D5F67 #144044 #0A2022 #000000

Tones

Mixing #319FAB with middle gray in 20% steps produces this scale. The first mixture, #4199A2, keeps 80% of the original. By #708689, the mixture is 80% middle gray.

#319FAB #4199A2 #51939A #608C91 #708689 #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

#319FAB

RGB

rgb(49 159 171)

HSL

hsl(185.902 55.455% 43.137%)

CSS example

.color-sample {
  background-color: #319FAB;
  color: #000000;
}

Channel breakdown

RGB

#319FAB uses 49 red, 159 green and 171 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 19.2%

Green 62.4%

Blue 67.1%

CMYK

A simple CMYK estimate for #319FAB is 71.3% cyan, 7.0% magenta, 0.0% yellow and 32.9% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 71.3%

Magenta 7.0%

Yellow 0.0%

Black 32.9%

Nearby colors

The nearest shorthand match is #3399AA. Its matching digit pairs let you write it as #39A in CSS. For a modern design, keep #319FAB when you want an exact match. Use its web-safe neighbor, #339999, when matching a legacy palette of 216 colors.

Nearest shorthand: #3399AA Nearest web-safe: #339999

Gradient to complement

#319FAB #458F97 #5A7E82 #6E6E6E #825E5A #974D45 #AB3D31

Color vision previews

Compare how #319FAB 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.

#9299AC

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.

#808CAB

Tritanopia

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

#00A6A2

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.

#7A9AAC

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.

#7193AB

Tritanomaly (50%)

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

#29A0A8

Grayscale (luminance)

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

#919191

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.

#6E989F

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 0.03071 G 0.34670 B 0.40724

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 0.32606 G 0.61490 B 0.66250

Linear Display P3

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

R 0.08681 G 0.33622 B 0.39643

CIE xyY

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

x 0.228 y 0.308 Y 28.388

CMY

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

C % 80.784 M % 37.647 Y % 32.941

Binary RGB

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

00110001 10011111 10101011