ColorTool
Log in
#181B21

#181b21 ≈ Rich Black

  • gray
  • Lightness: very low
  • Saturation: muted
  • Neutral
Check contrast Explore in graph Random color

#181b21 is a color from the gray family, with very low lightness and muted saturation. In the RGB model it is made of 9.41% red, 10.59% green and 12.94% blue; printed in CMYK it uses 27.27% cyan, 18.18% magenta, 0% yellow and 87.06% black. Its hue angle is 220°, with 15.79% saturation and 11.18% lightness in HSL. It is a neutral color, often associated with neutrality, balance and professionalism. Designers typically use it for body text and typography and corporate identities. White text on this color reaches a contrast ratio of 17.25:1 (WCAG AAA). The closest named color is Rich Black (#010b13), ΔE 4.75.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#003333
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.0109

Complementary

  1. #181b21
  2. #211e18

Split complementary

  1. #181b21
  2. #211a18
  3. #202118

Analogous

  1. #182021
  2. #181b21
  3. #1a1821

Triadic

  1. #181b21
  2. #21181b
  3. #1b2118

Tetradic

  1. #181b21
  2. #1e1821
  3. #211e18
  4. #1b2118

Square

  1. #181b21
  2. #211820
  3. #211e18
  4. #18211a

Monochromatic

  1. #090a0c
  2. #090a0c
  3. #181b21
  4. #383f4d
  5. #58637a

Shades

#181b21 mixed progressively with black.

  1. #181b21
  2. #16181e
  3. #13161a
  4. #111317
  5. #0e1014
  6. #0c0e11
  7. #0a0b0d
  8. #07080a
  9. #050507
  10. #020303
  11. #000000

Tints

#181b21 mixed progressively with white.

  1. #181b21
  2. #2f3237
  3. #46494d
  4. #5d5f64
  5. #74767a
  6. #8c8d90
  7. #a3a4a6
  8. #babbbc
  9. #d1d1d3
  10. #e8e8e9
  11. #ffffff

Tones

#181b21 mixed progressively with gray.

  1. #181b21
  2. #22252b
  3. #2d2f34
  4. #37393e
  5. #424347
  6. #4c4e51
  7. #56585a
  8. #616264
  9. #6b6c6d
  10. #767677
  11. #808080

Readable text 17.25:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓
Readable text 1.22:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕

Achromatopsia #1b1b1b ≈ 0.003% of males
Achromatomaly #1a1b1d ≈ 0.001% of males
Protanopia #191b21 ≈ 1.01% of males
Deuteranopia #181b21 ≈ 1.27% of males
Tritanopia #161c1d ≈ 0.0001% of males
Protanomaly #191b21 ≈ 1.08% of males
Deuteranomaly #181b21 ≈ 4.63% of males
Tritanomaly #171c1f ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-181b21 {
  color: #181b21;
}
Background
.bg-181b21 {
  background-color: #181b21;
  color: #ffffff;
}
Border
.border-181b21 {
  border: 2px solid #181b21;
}
CSS variables
:root {
  --color-primary: #181b21;
  --color-primary-rgb: 24 27 33;
  --color-primary-hsl: 220 16% 11%;
}
Gradient
.gradient-181b21 {
  background: linear-gradient(135deg, #181b21, #1a1821);
}
Colored shadow
.shadow-181b21 {
  box-shadow: 0 8px 24px rgb(24 27 33 / 0.35);
}

#010b13 Rich Black ΔE 4.75 #000000 Black ΔE 7.16 #100c08 Smoky Black ΔE 7.19 #1a1110 Licorice ΔE 8.02 #2a3439 Gunmetal ΔE 8.57 #343434 Jet ΔE 8.99 #353839 Onyx ΔE 9.79 #e7e4de Inverted #1b1b1b Grayscale 

Rich Black
#181b21  rgb(24, 27, 33)  hsl(220, 16%, 11%)  Rich Black
#211e18  rgb(33, 30, 24)  hsl(40, 16%, 11%)  Smoky Black
#21181b  rgb(33, 24, 27)  hsl(340, 16%, 11%)  Licorice
#1b2118  rgb(27, 33, 24)  hsl(100, 16%, 11%)  Smoky Black