ColorTool
Log in
#371CFB

#371cfb ≈ Ultramarine

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

#371cfb is a color from the blue family, with medium lightness and vivid saturation. In the RGB model it is made of 21.57% red, 10.98% green and 98.43% blue; printed in CMYK it uses 78.09% cyan, 88.84% magenta, 0% yellow and 1.57% black. Its hue angle is 247.26°, with 96.54% saturation and 54.71% 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 7.72:1 (WCAG AAA). The closest named color is Ultramarine (#3f00ff), ΔE 1.64.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#3333ff
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.0861

Complementary

  1. #371cfb
  2. #e0fb1c

Split complementary

  1. #371cfb
  2. #fba61c
  3. #71fb1c

Analogous

  1. #1c71fb
  2. #371cfb
  3. #a61cfb

Triadic

  1. #371cfb
  2. #fb371c
  3. #1cfb37

Tetradic

  1. #371cfb
  2. #fb1ce0
  3. #e0fb1c
  4. #1cfb37

Square

  1. #371cfb
  2. #fb1c71
  3. #e0fb1c
  4. #1cfba6

Monochromatic

  1. #11027c
  2. #1b04c7
  3. #371cfb
  4. #7967fc
  5. #bbb2fe

Shades

#371cfb mixed progressively with black.

  1. #371cfb
  2. #3219e2
  3. #2c16c9
  4. #2714b0
  5. #211197
  6. #1c0e7e
  7. #160b64
  8. #11084b
  9. #0b0632
  10. #060319
  11. #000000

Tints

#371cfb mixed progressively with white.

  1. #371cfb
  2. #4b33fb
  3. #5f49fc
  4. #7360fc
  5. #8777fd
  6. #9b8efd
  7. #afa4fd
  8. #c3bbfe
  9. #d7d2fe
  10. #ebe8ff
  11. #ffffff

Tones

#371cfb mixed progressively with gray.

  1. #371cfb
  2. #3e26ef
  3. #4630e2
  4. #4d3ad6
  5. #5444ca
  6. #5c4ebe
  7. #6358b1
  8. #6a62a5
  9. #716c99
  10. #79768c
  11. #808080

Readable text 7.72:1 AA ✓ AA Large ✓ AAA ✓ AAA Large ✓
Readable text 2.72:1 AA ✕ AA Large ✕ AAA ✕ AAA Large ✕

Achromatopsia #535353 ≈ 0.003% of males
Achromatomaly #4943b1 ≈ 0.001% of males
Protanopia #005dff ≈ 1.01% of males
Deuteranopia #0048f8 ≈ 1.27% of males
Tritanopia #006c95 ≈ 0.0001% of males
Protanomaly #004bfe ≈ 1.08% of males
Deuteranomaly #003bf9 ≈ 4.63% of males
Tritanomaly #0057c6 ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-371cfb {
  color: #371cfb;
}
Background
.bg-371cfb {
  background-color: #371cfb;
  color: #ffffff;
}
Border
.border-371cfb {
  border: 2px solid #371cfb;
}
CSS variables
:root {
  --color-primary: #371cfb;
  --color-primary-rgb: 55 28 251;
  --color-primary-hsl: 247 97% 55%;
}
Gradient
.gradient-371cfb {
  background: linear-gradient(135deg, #371cfb, #a61cfb);
}
Colored shadow
.shadow-371cfb {
  box-shadow: 0 8px 24px rgb(55 28 251 / 0.35);
}

#3f00ff Ultramarine ΔE 1.64 #5218fa Han Purple ΔE 2.02 #0000ff Blue ΔE 2.70 #6f00ff Electric Indigo ΔE 5.11 #0000cd Medium Blue ΔE 8.13 #1c39bb Persian Blue ΔE 9.30 #8f00ff Electric Violet ΔE 9.40 #c8e304 Inverted #535353 Grayscale 

Ultramarine
#371cfb  rgb(55, 28, 251)  hsl(247, 97%, 55%)  Ultramarine
#e0fb1c  rgb(224, 251, 28)  hsl(67, 97%, 55%)  Lemon Lime
#fb371c  rgb(251, 55, 28)  hsl(7, 97%, 55%)  Scarlet
#1cfb37  rgb(28, 251, 55)  hsl(127, 97%, 55%)  Lime