ColorTool
Log in
#21DCFB

#21dcfb ≈ Sky Blue

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

#21dcfb is a color from the cyan family, with medium lightness and vivid saturation. In the RGB model it is made of 12.94% red, 86.27% green and 98.43% blue; printed in CMYK it uses 86.85% cyan, 12.35% magenta, 0% yellow and 1.57% black. Its hue angle is 188.53°, with 96.46% saturation and 55.69% 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 call-to-action buttons. Black text on this color reaches a contrast ratio of 12.69:1 (WCAG AAA). The closest named color is Sky Blue (#87ceeb), ΔE 8.4.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#33ccff
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.5847

Complementary

  1. #21dcfb
  2. #fb4021

Split complementary

  1. #21dcfb
  2. #fb216f
  3. #fbad21

Analogous

  1. #21fbad
  2. #21dcfb
  3. #216ffb

Triadic

  1. #21dcfb
  2. #fb21dc
  3. #dcfb21

Tetradic

  1. #21dcfb
  2. #4021fb
  3. #fb4021
  4. #dcfb21

Square

  1. #21dcfb
  2. #ad21fb
  3. #fb4021
  4. #6ffb21

Monochromatic

  1. #026f81
  2. #04afcc
  3. #21dcfb
  4. #6ce8fc
  5. #b7f4fe

Shades

#21dcfb mixed progressively with black.

  1. #21dcfb
  2. #1ec6e2
  3. #1ab0c9
  4. #179ab0
  5. #148497
  6. #116e7e
  7. #0d5864
  8. #0a424b
  9. #072c32
  10. #031619
  11. #000000

Tints

#21dcfb mixed progressively with white.

  1. #21dcfb
  2. #37e0fb
  3. #4de3fc
  4. #64e7fc
  5. #7aeafd
  6. #90eefd
  7. #a6f1fd
  8. #bcf5fe
  9. #d3f8fe
  10. #e9fcff
  11. #ffffff

Tones

#21dcfb mixed progressively with gray.

  1. #21dcfb
  2. #2bd3ef
  3. #34cae2
  4. #3ec0d6
  5. #47b7ca
  6. #51aebe
  7. #5aa5b1
  8. #649ca5
  9. #6d9299
  10. #77898c
  11. #808080

Readable text 1.65:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕
Readable text 12.69:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓

Achromatopsia #c9c9c9 ≈ 0.003% of males
Achromatomaly #a1d1df ≈ 0.001% of males
Protanopia #c5d4fd ≈ 1.01% of males
Deuteranopia #aac1fb ≈ 1.27% of males
Tritanopia #00e8e6 ≈ 0.0001% of males
Protanomaly #9ed7fc ≈ 1.08% of males
Deuteranomaly #88ccfb ≈ 4.63% of males
Tritanomaly #00e3ee ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-21dcfb {
  color: #21dcfb;
}
Background
.bg-21dcfb {
  background-color: #21dcfb;
  color: #000000;
}
Border
.border-21dcfb {
  border: 2px solid #21dcfb;
}
CSS variables
:root {
  --color-primary: #21dcfb;
  --color-primary-rgb: 33 220 251;
  --color-primary-hsl: 189 96% 56%;
}
Gradient
.gradient-21dcfb {
  background: linear-gradient(135deg, #21dcfb, #216ffb);
}
Colored shadow
.shadow-21dcfb {
  box-shadow: 0 8px 24px rgb(33 220 251 / 0.35);
}

#87ceeb Sky Blue ΔE 8.40 #89cff0 Baby Blue ΔE 9.11 #00ced1 Dark Turquoise ΔE 9.82 #a4dded Non-Photo Blue ΔE 9.91 #7df9ff Electric Blue ΔE 10.02 #00cccc Robin Egg Blue ΔE 10.98 #87cefa Light Sky Blue ΔE 11.15 #de2304 Inverted #c9c9c9 Grayscale 

Sky Blue
#21dcfb  rgb(33, 220, 251)  hsl(189, 96%, 56%)  Sky Blue
#fb4021  rgb(251, 64, 33)  hsl(9, 96%, 56%)  Ferrari Red
#fb21dc  rgb(251, 33, 220)  hsl(309, 96%, 56%)  Shocking Pink
#dcfb21  rgb(220, 251, 33)  hsl(69, 96%, 56%)  Chartreuse Yellow