#001C19

sRGB · 0 / 28 / 25

#001C19 belongs to the cyan family. Its hex code tells a screen to mix 0 red, 28 green and 25 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 173.6° lands in the cyan region. Its 100.0% saturation makes it strong in color at this lightness. HSL lightness is 5.5% on a scale from black (0%) to white (100%). Of black and white lettering, white has the clearer light-to-dark separation on this background (17.79:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 0, 28, 25
HSL: 173.57°, 100.00%, 5.49%
HSV / HSB: 173.57°, 100.00%, 10.98%
CMYK (approx.): 100.00%, 0.00%, 10.71%, 89.02%
CIE XYZ (D65, Y = 100 for white): 0.591, 0.901, 1.062
CIELAB (D65, 2° observer): 8.135, -10.866, -1.123
WCAG relative luminance: 0.00901
24-bit decimal: 7193

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 #001C19 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 · 1.18:1

Normal text: Fail
Large text: Fail

White text · 17.79:1

Normal text: AAA
Large text: AAA

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. 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

#1C0003 sits half a turn (180°) from #001C19 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.

#001C19 #1C0003

Analogous

#001C0B and #00111C sit 30° to either side of #001C19. 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.

#001C0B #001C19 #00111C

Triadic

#001C19, #19001C and #1C1900 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#001C19 #19001C #1C1900

Split complementary

Start at #001C19 and look across the wheel. #1C0011 and #1C0B00 sit 30° to either side of its exact opposite, giving you two different accent choices.

#001C19 #1C0011 #1C0B00

Square

Starting with #001C19, each quarter turn (90°) takes you to the next hue: #0B001C, #1C0003, then #111C00. Across the square, #001C19 pairs with #1C0003, and #0B001C with #111C00.

#001C19 #0B001C #1C0003 #111C00

Tetradic

#001C19 and #1C0003 are opposites, as are #00031C and #1C1900. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#001C19 #00031C #1C0003 #1C1900

Tints

Mixing #001C19 with white in 20% steps produces this scale. The first mixture, #334947, keeps 80% of the original. By #CCD2D1, the mixture is 80% white.

#001C19 #334947 #667775 #99A4A3 #CCD2D1 #FFFFFF

Shades

Mixing #001C19 with black in 20% steps produces this scale. The first mixture, #001614, keeps 80% of the original. By #000605, the mixture is 80% black.

#001C19 #001614 #00110F #000B0A #000605 #000000

Tones

Mixing #001C19 with middle gray in 20% steps produces this scale. The first mixture, #1A302E, keeps 80% of the original. By #666C6B, the mixture is 80% middle gray.

#001C19 #1A302E #334442 #4D5857 #666C6B #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

#001C19

RGB

rgb(0 28 25)

HSL

hsl(173.571 100.000% 5.490%)

CSS example

.color-sample {
  background-color: #001C19;
  color: #FFFFFF;
}

Channel breakdown

RGB

#001C19 uses 0 red, 28 green and 25 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 0.0%

Green 11.0%

Blue 9.8%

CMYK

A simple CMYK estimate for #001C19 is 100.0% cyan, 0.0% magenta, 10.7% yellow and 89.0% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 100.0%

Magenta 0.0%

Yellow 10.7%

Black 89.0%

Nearby colors

The nearest shorthand match is #002211. Its matching digit pairs let you write it as #021 in CSS. For a modern design, keep #001C19 when you want an exact match. Use its web-safe neighbor, #003300, when matching a legacy palette of 216 colors.

Nearest shorthand · #002211 Nearest web-safe · #003300

Gradient to complement

#001C19 #051715 #091312 #0E0E0E #13090A #170507 #1C0003

Color vision previews

Compare how #001C19 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.

#1A1A19

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.

#161619

Tritanopia

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

#001D1B

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.

#131A19

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.

#111919

Tritanomaly (50%)

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

#001C1A

Grayscale (luminance)

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

#181818

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.

#0E1A18

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 0.01161 B 0.00972

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 0.02664 G 0.10750 B 0.09785

Linear Display P3

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

R 0.00206 G 0.01123 B 0.00969

CIE xyY

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

x 0.231 y 0.353 Y 0.901

CMY

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

C % 100.000 M % 89.020 Y % 90.196

Binary RGB

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

00000000 00011100 00011001