ColorTool
Log in
#21ACD3

#21acd3 ≈ Moonstone Blue

  • cyan
  • Lightness: medium
  • Saturation: strong
  • Cool
Check contrast Explore in graph Random color

#21acd3 is a color from the cyan family, with medium lightness and strong saturation. In the RGB model it is made of 12.94% red, 67.45% green and 82.75% blue; printed in CMYK it uses 84.36% cyan, 18.48% magenta, 0% yellow and 17.25% black. Its hue angle is 193.15°, with 72.95% saturation and 47.84% lightness in HSL. It is a cool color, often associated with freshness, technology and clarity. Designers typically use it for health and wellness, technology products and brand accents. Black text on this color reaches a contrast ratio of 7.91:1 (WCAG AAA). The closest named color is Moonstone Blue (#73a9c2), ΔE 6.94.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#3399cc
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.3453

Complementary

  1. #21acd3
  2. #d34821

Split complementary

  1. #21acd3
  2. #d32153
  3. #d3a121

Analogous

  1. #21d3a1
  2. #21acd3
  3. #2153d3

Triadic

  1. #21acd3
  2. #d321ac
  3. #acd321

Tetradic

  1. #21acd3
  2. #4821d3
  3. #d34821
  4. #acd321

Square

  1. #21acd3
  2. #a121d3
  3. #d34821
  4. #53d321

Monochromatic

  1. #0c404f
  2. #177691
  3. #21acd3
  4. #5bc7e5
  5. #9ddef0

Shades

#21acd3 mixed progressively with black.

  1. #21acd3
  2. #1e9bbe
  3. #1a8aa9
  4. #177894
  5. #14677f
  6. #11566a
  7. #0d4554
  8. #0a343f
  9. #07222a
  10. #031115
  11. #000000

Tints

#21acd3 mixed progressively with white.

  1. #21acd3
  2. #37b4d7
  3. #4dbddc
  4. #64c5e0
  5. #7acde5
  6. #90d6e9
  7. #a6deed
  8. #bce6f2
  9. #d3eef6
  10. #e9f7fb
  11. #ffffff

Tones

#21acd3 mixed progressively with gray.

  1. #21acd3
  2. #2ba8cb
  3. #34a3c2
  4. #3e9fba
  5. #479ab2
  6. #5196aa
  7. #5a92a1
  8. #648d99
  9. #6d8991
  10. #778488
  11. #808080

Readable text 2.66:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕
Readable text 7.91:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓

Achromatopsia #9f9f9f ≈ 0.003% of males
Achromatomaly #7fa4b6 ≈ 0.001% of males
Protanopia #96a8d5 ≈ 1.01% of males
Deuteranopia #7f98d3 ≈ 1.27% of males
Tritanopia #00b8b9 ≈ 0.0001% of males
Protanomaly #78aad4 ≈ 1.08% of males
Deuteranomaly #66a0d3 ≈ 4.63% of males
Tritanomaly #00b3c4 ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-21acd3 {
  color: #21acd3;
}
Background
.bg-21acd3 {
  background-color: #21acd3;
  color: #000000;
}
Border
.border-21acd3 {
  border: 2px solid #21acd3;
}
CSS variables
:root {
  --color-primary: #21acd3;
  --color-primary-rgb: 33 172 211;
  --color-primary-hsl: 193 73% 48%;
}
Gradient
.gradient-21acd3 {
  background: linear-gradient(135deg, #21acd3, #2153d3);
}
Colored shadow
.shadow-21acd3 {
  box-shadow: 0 8px 24px rgb(33 172 211 / 0.35);
}

#73a9c2 Moonstone Blue ΔE 6.94 #0095b6 Bondi Blue ΔE 7.42 #00bfff Deep Sky Blue ΔE 7.85 #56a0d3 Carolina Blue ΔE 8.31 #71a6d2 Iceberg ΔE 9.64 #73c2fb Maya Blue ΔE 11.18 #87ceeb Sky Blue ΔE 11.36 #de532c Inverted #9f9f9f Grayscale 

Moonstone Blue
#21acd3  rgb(33, 172, 211)  hsl(193, 73%, 48%)  Moonstone Blue
#d34821  rgb(211, 72, 33)  hsl(13, 73%, 48%)  Sinopia
#d321ac  rgb(211, 33, 172)  hsl(313, 73%, 48%)  Medium Violet Red
#acd321  rgb(172, 211, 33)  hsl(73, 73%, 48%)  Yellow Green