ColorTool
Log in
#EF003B

#ef003b ≈ Crimson

  • red
  • Lightness: medium
  • Saturation: vivid
  • Warm
Check contrast Explore in graph Random color

#ef003b is a color from the red family, with medium lightness and vivid saturation. In the RGB model it is made of 93.73% red, 0% green and 23.14% blue; printed in CMYK it uses 0% cyan, 100% magenta, 75.31% yellow and 6.27% black. Its hue angle is 345.19°, with 100% saturation and 46.86% lightness in HSL. It is a warm color, often associated with energy, passion and urgency. Designers typically use it for food and restaurant brands, sales and promotions and call-to-action buttons. Black text on this color reaches a contrast ratio of 4.73:1 (WCAG AA). The closest named color is Crimson (#dc143c), ΔE 3.8.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#ff0033
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.1867

Complementary

  1. #ef003b
  2. #00efb4

Split complementary

  1. #ef003b
  2. #00ef3d
  3. #00b2ef

Analogous

  1. #ef00b2
  2. #ef003b
  3. #ef3d00

Triadic

  1. #ef003b
  2. #3bef00
  3. #003bef

Tetradic

  1. #ef003b
  2. #efb400
  3. #00efb4
  4. #003bef

Square

  1. #ef003b
  2. #b2ef00
  3. #00efb4
  4. #3d00ef

Monochromatic

  1. #560015
  2. #a20028
  3. #ef003b
  4. #ff3c6c
  5. #ff89a6

Shades

#ef003b mixed progressively with black.

  1. #ef003b
  2. #d70035
  3. #bf002f
  4. #a70029
  5. #8f0023
  6. #78001e
  7. #600018
  8. #480012
  9. #30000c
  10. #180006
  11. #000000

Tints

#ef003b mixed progressively with white.

  1. #ef003b
  2. #f11a4f
  3. #f23362
  4. #f44d76
  5. #f56689
  6. #f7809d
  7. #f999b1
  8. #fab3c4
  9. #fcccd8
  10. #fde6eb
  11. #ffffff

Tones

#ef003b mixed progressively with gray.

  1. #ef003b
  2. #e40d42
  3. #d91a49
  4. #ce2650
  5. #c33357
  6. #b8405e
  7. #ac4d64
  8. #a15a6b
  9. #966672
  10. #8b7379
  11. #808080

Readable text 4.44:1 AA ✕ AA Large ✓ AAA ✕ AAA Large ✕
Readable text 4.73:1 AA ✓ AA Large ✓ AAA ✕ AAA Large ✓

Achromatopsia #787878 ≈ 0.003% of males
Achromatomaly #b45e65 ≈ 0.001% of males
Protanopia #625a3a ≈ 1.01% of males
Deuteranopia #968732 ≈ 1.27% of males
Tritanopia #ff0024 ≈ 0.0001% of males
Protanomaly #ad463b ≈ 1.08% of males
Deuteranomaly #c06b36 ≈ 4.63% of males
Tritanomaly #fe002f ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-ef003b {
  color: #ef003b;
}
Background
.bg-ef003b {
  background-color: #ef003b;
  color: #000000;
}
Border
.border-ef003b {
  border: 2px solid #ef003b;
}
CSS variables
:root {
  --color-primary: #ef003b;
  --color-primary-rgb: 239 0 59;
  --color-primary-hsl: 345 100% 47%;
}
Gradient
.gradient-ef003b {
  background: linear-gradient(135deg, #ef003b, #ef3d00);
}
Colored shadow
.shadow-ef003b {
  box-shadow: 0 8px 24px rgb(239 0 59 / 0.35);
}

#dc143c Crimson ΔE 3.80 #fd0e35 Tractor Red ΔE 4.26 #e52b50 Amaranth ΔE 4.81 #ff004f Folly ΔE 5.11 #e30022 Cadmium Red ΔE 5.84 #cc3333 Persian Red ΔE 6.62 #e62020 Lust ΔE 7.18 #10ffc4 Inverted #787878 Grayscale 

Crimson
#ef003b  rgb(239, 0, 59)  hsl(345, 100%, 47%)  Crimson
#00efb4  rgb(0, 239, 180)  hsl(165, 100%, 47%)  Aquamarine
#3bef00  rgb(59, 239, 0)  hsl(105, 100%, 47%)  Neon Green
#003bef  rgb(0, 59, 239)  hsl(225, 100%, 47%)  Persian Blue