ColorTool
Log in
#21B2DA

#21b2da ≈ Deep Sky Blue

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

#21b2da is a color from the cyan family, with medium lightness and strong saturation. In the RGB model it is made of 12.94% red, 69.8% green and 85.49% blue; printed in CMYK it uses 84.86% cyan, 18.35% magenta, 0% yellow and 14.51% black. Its hue angle is 192.97°, with 73.71% saturation and 49.22% 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 8.45:1 (WCAG AAA). The closest named color is Deep Sky Blue (#00bfff), ΔE 6.74.

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 luminance0.3723

Complementary

  1. #21b2da
  2. #da4921

Split complementary

  1. #21b2da
  2. #da2156
  3. #daa621

Analogous

  1. #21daa6
  2. #21b2da
  3. #2156da

Triadic

  1. #21b2da
  2. #da21b2
  3. #b2da21

Tetradic

  1. #21b2da
  2. #4921da
  3. #da4921
  4. #b2da21

Square

  1. #21b2da
  2. #a621da
  3. #da4921
  4. #56da21

Monochromatic

  1. #0d4655
  2. #177c98
  3. #21b2da
  4. #61cae7
  5. #a3e0f1

Shades

#21b2da mixed progressively with black.

  1. #21b2da
  2. #1ea0c4
  3. #1a8eae
  4. #177d99
  5. #146b83
  6. #11596d
  7. #0d4757
  8. #0a3541
  9. #07242c
  10. #031216
  11. #000000

Tints

#21b2da mixed progressively with white.

  1. #21b2da
  2. #37bade
  3. #4dc1e1
  4. #64c9e5
  5. #7ad1e9
  6. #90d9ed
  7. #a6e0f0
  8. #bce8f4
  9. #d3f0f8
  10. #e9f7fb
  11. #ffffff

Tones

#21b2da mixed progressively with gray.

  1. #21b2da
  2. #2badd1
  3. #34a8c8
  4. #3ea3bf
  5. #479eb6
  6. #5199ad
  7. #5a94a4
  8. #648f9b
  9. #6d8a92
  10. #778589
  11. #808080

Readable text 2.49:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕
Readable text 8.45:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓

Achromatopsia #a4a4a4 ≈ 0.003% of males
Achromatomaly #84aabc ≈ 0.001% of males
Protanopia #9baedc ≈ 1.01% of males
Deuteranopia #849dda ≈ 1.27% of males
Tritanopia #00bebf ≈ 0.0001% of males
Protanomaly #7cafdb ≈ 1.08% of males
Deuteranomaly #6aa6da ≈ 4.63% of males
Tritanomaly #00baca ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-21b2da {
  color: #21b2da;
}
Background
.bg-21b2da {
  background-color: #21b2da;
  color: #000000;
}
Border
.border-21b2da {
  border: 2px solid #21b2da;
}
CSS variables
:root {
  --color-primary: #21b2da;
  --color-primary-rgb: 33 178 218;
  --color-primary-hsl: 193 74% 49%;
}
Gradient
.gradient-21b2da {
  background: linear-gradient(135deg, #21b2da, #2156da);
}
Colored shadow
.shadow-21b2da {
  box-shadow: 0 8px 24px rgb(33 178 218 / 0.35);
}

#00bfff Deep Sky Blue ΔE 6.74 #73a9c2 Moonstone Blue ΔE 7.31 #56a0d3 Carolina Blue ΔE 9.09 #0095b6 Bondi Blue ΔE 9.10 #71a6d2 Iceberg ΔE 10.02 #87ceeb Sky Blue ΔE 10.04 #73c2fb Maya Blue ΔE 10.29 #de4d25 Inverted #a4a4a4 Grayscale 

Deep Sky Blue
#21b2da  rgb(33, 178, 218)  hsl(193, 74%, 49%)  Deep Sky Blue
#da4921  rgb(218, 73, 33)  hsl(13, 74%, 49%)  Flame
#da21b2  rgb(218, 33, 178)  hsl(313, 74%, 49%)  Shocking Pink
#b2da21  rgb(178, 218, 33)  hsl(73, 74%, 49%)  June Bud