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#0021FF

#0021ff ≈ Blue

  • blue
  • Lightness: medium
  • Saturation: vivid
  • Cool
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#0021ff is a color from the blue family, with medium lightness and vivid saturation. In the RGB model it is made of 0% red, 12.94% green and 100% blue; printed in CMYK it uses 100% cyan, 87.06% magenta, 0% yellow and 0% black. Its hue angle is 232.24°, with 100% saturation and 50% lightness in HSL. It is a cool color, often associated with trust, stability and focus. Designers typically use it for technology products, finance and banking and call-to-action buttons. White text on this color reaches a contrast ratio of 7.89:1 (WCAG AAA). The closest named color is Blue (#0000ff), ΔE 2.57.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#0033ff
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.0831

Complementary

  1. #0021ff
  2. #ffde00

Split complementary

  1. #0021ff
  2. #ff5f00
  3. #a0ff00

Analogous

  1. #00a0ff
  2. #0021ff
  3. #5f00ff

Triadic

  1. #0021ff
  2. #ff0021
  3. #21ff00

Tetradic

  1. #0021ff
  2. #de00ff
  3. #ffde00
  4. #21ff00

Square

  1. #0021ff
  2. #ff00a0
  3. #ffde00
  4. #00ff5f

Monochromatic

  1. #000d66
  2. #0017b3
  3. #0021ff
  4. #4d64ff
  5. #99a6ff

Shades

#0021ff mixed progressively with black.

  1. #0021ff
  2. #001ee6
  3. #001acc
  4. #0017b3
  5. #001499
  6. #001180
  7. #000d66
  8. #000a4d
  9. #000733
  10. #00031a
  11. #000000

Tints

#0021ff mixed progressively with white.

  1. #0021ff
  2. #1a37ff
  3. #334dff
  4. #4d64ff
  5. #667aff
  6. #8090ff
  7. #99a6ff
  8. #b3bcff
  9. #ccd3ff
  10. #e6e9ff
  11. #ffffff

Tones

#0021ff mixed progressively with gray.

  1. #0021ff
  2. #0d2bf2
  3. #1a34e6
  4. #263ed9
  5. #3347cc
  6. #4051c0
  7. #4d5ab3
  8. #5a64a6
  9. #666d99
  10. #73778d
  11. #808080

Readable text 7.89:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓
Readable text 2.66:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕

Achromatopsia #515151 ≈ 0.003% of males
Achromatomaly #3f43b3 ≈ 0.001% of males
Protanopia #005eff ≈ 1.01% of males
Deuteranopia #0044fc ≈ 1.27% of males
Tritanopia #007098 ≈ 0.0001% of males
Protanomaly #004cff ≈ 1.08% of males
Deuteranomaly #0039fd ≈ 4.63% of males
Tritanomaly #005aca ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-0021ff {
  color: #0021ff;
}
Background
.bg-0021ff {
  background-color: #0021ff;
  color: #ffffff;
}
Border
.border-0021ff {
  border: 2px solid #0021ff;
}
CSS variables
:root {
  --color-primary: #0021ff;
  --color-primary-rgb: 0 33 255;
  --color-primary-hsl: 232 100% 50%;
}
Gradient
.gradient-0021ff {
  background: linear-gradient(135deg, #0021ff, #5f00ff);
}
Colored shadow
.shadow-0021ff {
  box-shadow: 0 8px 24px rgb(0 33 255 / 0.35);
}

#0000ff Blue ΔE 2.57 #3f00ff Ultramarine ΔE 2.90 #5218fa Han Purple ΔE 3.66 #6f00ff Electric Indigo ΔE 6.69 #0000cd Medium Blue ΔE 7.97 #1c39bb Persian Blue ΔE 8.65 #4f42b5 Ocean Blue ΔE 10.01 #ffde00 Inverted #515151 Grayscale 

Blue
#0021ff  rgb(0, 33, 255)  hsl(232, 100%, 50%)  Blue
#ffde00  rgb(255, 222, 0)  hsl(52, 100%, 50%)  Golden Yellow
#ff0021  rgb(255, 0, 33)  hsl(352, 100%, 50%)  Tractor Red
#21ff00  rgb(33, 255, 0)  hsl(112, 100%, 50%)  Lime