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#2155FF

#2155ff ≈ Ultramarine Blue

  • blue
  • Lightness: medium
  • Saturation: vivid
  • Cool
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#2155ff is a color from the blue family, with medium lightness and vivid saturation. In the RGB model it is made of 12.94% red, 33.33% green and 100% blue; printed in CMYK it uses 87.06% cyan, 66.67% magenta, 0% yellow and 0% black. Its hue angle is 225.95°, with 100% saturation and 56.47% 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 5.51:1 (WCAG AA). The closest named color is Ultramarine Blue (#4166f5), ΔE 5.19.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#3366ff
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.1404

Complementary

  1. #2155ff
  2. #ffcb21

Split complementary

  1. #2155ff
  2. #ff5c21
  3. #c4ff21

Analogous

  1. #21c4ff
  2. #2155ff
  3. #5c21ff

Triadic

  1. #2155ff
  2. #ff2155
  3. #55ff21

Tetradic

  1. #2155ff
  2. #cb21ff
  3. #ffcb21
  4. #55ff21

Square

  1. #2155ff
  2. #ff21c4
  3. #ffcb21
  4. #21ff5c

Monochromatic

  1. #002087
  2. #0032d3
  3. #2155ff
  4. #6d90ff
  5. #bacaff

Shades

#2155ff mixed progressively with black.

  1. #2155ff
  2. #1e4de6
  3. #1a44cc
  4. #173cb3
  5. #143399
  6. #112b80
  7. #0d2266
  8. #0a1a4d
  9. #071133
  10. #03091a
  11. #000000

Tints

#2155ff mixed progressively with white.

  1. #2155ff
  2. #3766ff
  3. #4d77ff
  4. #6488ff
  5. #7a99ff
  6. #90aaff
  7. #a6bbff
  8. #bcccff
  9. #d3ddff
  10. #e9eeff
  11. #ffffff

Tones

#2155ff mixed progressively with gray.

  1. #2155ff
  2. #2b59f2
  3. #345ee6
  4. #3e62d9
  5. #4766cc
  6. #516bc0
  7. #5a6fb3
  8. #6473a6
  9. #6d7799
  10. #777c8d
  11. #808080

Readable text 5.51:1 AA ✓ AA Large ✓ AAA ✕ AAA Large ✓
Readable text 3.81:1 AA ✕ AA Large ✓ AAA ✕ AAA Large ✕

Achromatopsia #696969 ≈ 0.003% of males
Achromatomaly #5561b9 ≈ 0.001% of males
Protanopia #0073ff ≈ 1.01% of males
Deuteranopia #005efc ≈ 1.27% of males
Tritanopia #0084a3 ≈ 0.0001% of males
Protanomaly #0068ff ≈ 1.08% of males
Deuteranomaly #005bfd ≈ 4.63% of males
Tritanomaly #0074ce ≈ 0.0002% of males
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Text in this color

Background in this color

Border in this color

Text color
.text-2155ff {
  color: #2155ff;
}
Background
.bg-2155ff {
  background-color: #2155ff;
  color: #ffffff;
}
Border
.border-2155ff {
  border: 2px solid #2155ff;
}
CSS variables
:root {
  --color-primary: #2155ff;
  --color-primary-rgb: 33 85 255;
  --color-primary-hsl: 226 100% 56%;
}
Gradient
.gradient-2155ff {
  background: linear-gradient(135deg, #2155ff, #5c21ff);
}
Colored shadow
.shadow-2155ff {
  box-shadow: 0 8px 24px rgb(33 85 255 / 0.35);
}

#4166f5 Ultramarine Blue ΔE 5.19 #6050dc Majorelle Blue ΔE 6.55 #4169e1 Royal Blue ΔE 6.78 #5a4fcf Iris ΔE 7.26 #6a5acd Slate Blue ΔE 8.70 #0070ff Brandeis Blue ΔE 9.10 #0f52ba Sapphire ΔE 9.55 #deaa00 Inverted #696969 Grayscale 

Ultramarine Blue
#2155ff  rgb(33, 85, 255)  hsl(226, 100%, 56%)  Ultramarine Blue
#ffcb21  rgb(255, 203, 33)  hsl(46, 100%, 56%)  Sunglow
#ff2155  rgb(255, 33, 85)  hsl(346, 100%, 56%)  Folly
#55ff21  rgb(85, 255, 33)  hsl(106, 100%, 56%)  Harlequin