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#377BB5

#377bb5 ≈ Tufts Blue

  • azure
  • Lightness: medium
  • Saturation: moderate
  • Cool
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#377bb5 is a color from the azure family, with medium lightness and moderate saturation. In the RGB model it is made of 21.57% red, 48.24% green and 70.98% blue; printed in CMYK it uses 69.61% cyan, 32.04% magenta, 0% yellow and 29.02% black. Its hue angle is 207.62°, with 53.39% saturation and 46.27% 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 4.66:1 (WCAG AA). The closest named color is Tufts Blue (#417dc1), ΔE 2.67.

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 luminance0.1831

Complementary

  1. #377bb5
  2. #b57137

Split complementary

  1. #377bb5
  2. #b5373c
  3. #b5b037

Analogous

  1. #37b5b0
  2. #377bb5
  3. #373cb5

Triadic

  1. #377bb5
  2. #b5377b
  3. #7bb537

Tetradic

  1. #377bb5
  2. #7137b5
  3. #b57137
  4. #7bb537

Square

  1. #377bb5
  2. #b037b5
  3. #b57137
  4. #3cb537

Monochromatic

  1. #132b40
  2. #25537a
  3. #377bb5
  4. #68a0d1
  5. #a2c5e3

Shades

#377bb5 mixed progressively with black.

  1. #377bb5
  2. #326fa3
  3. #2c6291
  4. #27567f
  5. #214a6d
  6. #1c3e5b
  7. #163148
  8. #112536
  9. #0b1924
  10. #060c12
  11. #000000

Tints

#377bb5 mixed progressively with white.

  1. #377bb5
  2. #4b88bc
  3. #5f95c4
  4. #73a3cb
  5. #87b0d3
  6. #9bbdda
  7. #afcae1
  8. #c3d7e9
  9. #d7e5f0
  10. #ebf2f8
  11. #ffffff

Tones

#377bb5 mixed progressively with gray.

  1. #377bb5
  2. #3e7cb0
  3. #467caa
  4. #4d7da5
  5. #547da0
  6. #5c7e9b
  7. #637e95
  8. #6a7f90
  9. #717f8b
  10. #798085
  11. #808080

Readable text 4.5:1 AA ✓ AA Large ✓ AAA ✕ AAA Large ✓
Readable text 4.66:1 AA ✓ AA Large ✓ AAA ✕ AAA Large ✓

Achromatopsia #777777 ≈ 0.003% of males
Achromatomaly #637894 ≈ 0.001% of males
Protanopia #617db8 ≈ 1.01% of males
Deuteranopia #4f71b4 ≈ 1.27% of males
Tritanopia #008990 ≈ 0.0001% of males
Protanomaly #537cb7 ≈ 1.08% of males
Deuteranomaly #4775b4 ≈ 4.63% of males
Tritanomaly #0084a0 ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-377bb5 {
  color: #377bb5;
}
Background
.bg-377bb5 {
  background-color: #377bb5;
  color: #000000;
}
Border
.border-377bb5 {
  border: 2px solid #377bb5;
}
CSS variables
:root {
  --color-primary: #377bb5;
  --color-primary-rgb: 55 123 181;
  --color-primary-hsl: 208 53% 46%;
}
Gradient
.gradient-377bb5 {
  background: linear-gradient(135deg, #377bb5, #373cb5);
}
Colored shadow
.shadow-377bb5 {
  box-shadow: 0 8px 24px rgb(55 123 181 / 0.35);
}

#417dc1 Tufts Blue ΔE 2.67 #4682b4 Steel Blue ΔE 2.86 #0072bb French Blue ΔE 3.82 #0073cf True Blue ΔE 3.91 #007ba7 Cerulean ΔE 6.59 #6082b6 Glaucous ΔE 6.78 #436b95 Queen Blue ΔE 7.07 #c8844a Inverted #777777 Grayscale 

Tufts Blue
#377bb5  rgb(55, 123, 181)  hsl(208, 53%, 46%)  Tufts Blue
#b57137  rgb(181, 113, 55)  hsl(28, 53%, 46%)  Copper
#b5377b  rgb(181, 55, 123)  hsl(328, 53%, 46%)  Medium Violet Red
#7bb537  rgb(123, 181, 55)  hsl(88, 53%, 46%)  Apple Green