ColorTool
Log in
#237BDF

#237bdf ≈ Tufts Blue

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

#237bdf is a color from the azure family, with medium lightness and strong saturation. In the RGB model it is made of 13.73% red, 48.24% green and 87.45% blue; printed in CMYK it uses 84.3% cyan, 44.84% magenta, 0% yellow and 12.55% black. Its hue angle is 211.91°, with 74.6% saturation and 50.59% 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 4.97:1 (WCAG AA). The closest named color is Tufts Blue (#417dc1), ΔE 2.79.

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 luminance0.1985

Complementary

  1. #237bdf
  2. #df8723

Split complementary

  1. #237bdf
  2. #df2923
  3. #d9df23

Analogous

  1. #23d9df
  2. #237bdf
  3. #2923df

Triadic

  1. #237bdf
  2. #df237b
  3. #7bdf23

Tetradic

  1. #237bdf
  2. #8723df
  3. #df8723
  4. #7bdf23

Square

  1. #237bdf
  2. #df23d9
  3. #df8723
  4. #23df29

Monochromatic

  1. #0d325c
  2. #17569e
  3. #237bdf
  4. #66a3e9
  5. #a9cbf2

Shades

#237bdf mixed progressively with black.

  1. #237bdf
  2. #206fc9
  3. #1c62b2
  4. #19569c
  5. #154a86
  6. #123e70
  7. #0e3159
  8. #0b2543
  9. #07192d
  10. #040c16
  11. #000000

Tints

#237bdf mixed progressively with white.

  1. #237bdf
  2. #3988e2
  3. #4f95e5
  4. #65a3e9
  5. #7bb0ec
  6. #91bdef
  7. #a7caf2
  8. #bdd7f5
  9. #d3e5f9
  10. #e9f2fc
  11. #ffffff

Tones

#237bdf mixed progressively with gray.

  1. #237bdf
  2. #2c7cd6
  3. #367ccc
  4. #3f7dc3
  5. #487db9
  6. #527eb0
  7. #5b7ea6
  8. #647f9d
  9. #6d7f93
  10. #77808a
  11. #808080

Readable text 4.23:1 AA ✕ AA Large ✓ AAA ✕ AAA Large ✕
Readable text 4.97:1 AA ✓ AA Large ✓ AAA ✕ AAA Large ✓

Achromatopsia #7b7b7b ≈ 0.003% of males
Achromatomaly #637bac ≈ 0.001% of males
Protanopia #4584e3 ≈ 1.01% of males
Deuteranopia #1773dd ≈ 1.27% of males
Tritanopia #0093a2 ≈ 0.0001% of males
Protanomaly #3a81e1 ≈ 1.08% of males
Deuteranomaly #1c77de ≈ 4.63% of males
Tritanomaly #008abe ≈ 0.0002% of males
Simulate on your own image

Text in this color

Background in this color

Border in this color

Text color
.text-237bdf {
  color: #237bdf;
}
Background
.bg-237bdf {
  background-color: #237bdf;
  color: #000000;
}
Border
.border-237bdf {
  border: 2px solid #237bdf;
}
CSS variables
:root {
  --color-primary: #237bdf;
  --color-primary-rgb: 35 123 223;
  --color-primary-hsl: 212 75% 51%;
}
Gradient
.gradient-237bdf {
  background: linear-gradient(135deg, #237bdf, #2923df);
}
Colored shadow
.shadow-237bdf {
  box-shadow: 0 8px 24px rgb(35 123 223 / 0.35);
}

#417dc1 Tufts Blue ΔE 2.79 #0073cf True Blue ΔE 3.83 #4682b4 Steel Blue ΔE 5.06 #0070ff Brandeis Blue ΔE 5.48 #318ce7 Bleu de France ΔE 5.96 #0072bb French Blue ΔE 6.20 #6082b6 Glaucous ΔE 6.78 #dc8420 Inverted #7b7b7b Grayscale 

Tufts Blue
#237bdf  rgb(35, 123, 223)  hsl(212, 75%, 51%)  Tufts Blue
#df8723  rgb(223, 135, 35)  hsl(32, 75%, 51%)  Fulvous
#df237b  rgb(223, 35, 123)  hsl(332, 75%, 51%)  Telemagenta
#7bdf23  rgb(123, 223, 35)  hsl(92, 75%, 51%)  Lawn Green