ColorTool
Log in
#337BDE

#337bde ≈ Tufts Blue

  • azure
  • Lightness: medium
  • Saturation: strong
  • Cool
Check contrast Explore in graph Random color

#337bde is a color from the azure family, with medium lightness and strong saturation. In the RGB model it is made of 20% red, 48.24% green and 87.06% blue; printed in CMYK it uses 77.03% cyan, 44.59% magenta, 0% yellow and 12.94% black. Its hue angle is 214.74°, with 72.15% saturation and 53.53% lightness in HSL. It is a cool color, often associated with openness, freedom and calm. Designers typically use it for technology products, finance and banking and brand accents. Black text on this color reaches a contrast ratio of 5.03:1 (WCAG AA). The closest named color is Tufts Blue (#417dc1), ΔE 2.91.

Description generated from the measured properties of this color.

HEX
RGB
RGB percent
CMY
CMYK
HSL
HSV / HSB
Web safe#3366cc
CIE-LAB
XYZ
xyY
CIE-LCH
CIE-LUV
Hunter-Lab
OKLab
Binary
Decimal
Relative luminance0.2014

Complementary

  1. #337bde
  2. #de9633

Split complementary

  1. #337bde
  2. #de4133
  3. #d0de33

Analogous

  1. #33d0de
  2. #337bde
  3. #4133de

Triadic

  1. #337bde
  2. #de337b
  3. #7bde33

Tetradic

  1. #337bde
  2. #9633de
  3. #de9633
  4. #7bde33

Square

  1. #337bde
  2. #de33d0
  3. #de9633
  4. #33de41

Monochromatic

  1. #113567
  2. #1b57a9
  3. #337bde
  4. #75a6e9
  5. #b7d0f3

Shades

#337bde mixed progressively with black.

  1. #337bde
  2. #2e6fc8
  3. #2962b2
  4. #24569b
  5. #1f4a85
  6. #1a3e6f
  7. #143159
  8. #0f2543
  9. #0a192c
  10. #050c16
  11. #000000

Tints

#337bde mixed progressively with white.

  1. #337bde
  2. #4788e1
  3. #5c95e5
  4. #70a3e8
  5. #85b0eb
  6. #99bdef
  7. #adcaf2
  8. #c2d7f5
  9. #d6e5f8
  10. #ebf2fc
  11. #ffffff

Tones

#337bde mixed progressively with gray.

  1. #337bde
  2. #3b7cd5
  3. #427ccb
  4. #4a7dc2
  5. #527db8
  6. #5a7eaf
  7. #617ea6
  8. #697f9c
  9. #717f93
  10. #788089
  11. #808080

Readable text 4.18:1 AA ✕ AA Large ✓ AAA ✕ AAA Large ✕
Readable text 5.03:1 AA ✓ AA Large ✓ AAA ✕ AAA Large ✓

Achromatopsia #7c7c7c ≈ 0.003% of males
Achromatomaly #667cac ≈ 0.001% of males
Protanopia #4784e2 ≈ 1.01% of males
Deuteranopia #2275dc ≈ 1.27% of males
Tritanopia #0092a2 ≈ 0.0001% of males
Protanomaly #4081e0 ≈ 1.08% of males
Deuteranomaly #2a77dd ≈ 4.63% of males
Tritanomaly #008abd ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-337bde {
  color: #337bde;
}
Background
.bg-337bde {
  background-color: #337bde;
  color: #000000;
}
Border
.border-337bde {
  border: 2px solid #337bde;
}
CSS variables
:root {
  --color-primary: #337bde;
  --color-primary-rgb: 51 123 222;
  --color-primary-hsl: 215 72% 54%;
}
Gradient
.gradient-337bde {
  background: linear-gradient(135deg, #337bde, #4133de);
}
Colored shadow
.shadow-337bde {
  box-shadow: 0 8px 24px rgb(51 123 222 / 0.35);
}

#417dc1 Tufts Blue ΔE 2.91 #0073cf True Blue ΔE 4.51 #0070ff Brandeis Blue ΔE 4.97 #4682b4 Steel Blue ΔE 5.31 #6082b6 Glaucous ΔE 6.06 #318ce7 Bleu de France ΔE 6.23 #0072bb French Blue ΔE 6.97 #cc8421 Inverted #7c7c7c Grayscale 

Tufts Blue
#337bde  rgb(51, 123, 222)  hsl(215, 72%, 54%)  Tufts Blue
#de9633  rgb(222, 150, 51)  hsl(35, 72%, 54%)  Gamboge
#de337b  rgb(222, 51, 123)  hsl(335, 72%, 54%)  Telemagenta
#7bde33  rgb(123, 222, 51)  hsl(95, 72%, 54%)  Yellow Green