#3757A8#3757A8

#3757A8 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.7% C 0.135 H 265.4°. Best body text is #FFFFFF at 6.79:1 contrast (WCAG AA passes).

Color values

HEX	#3757A8
RGB	rgb(55, 87, 168)
HSL	hsl(223, 51%, 44%)
HSV	hsv(223, 67%, 66%)
CMYK	cmyk(67.3%, 48.2%, 0%, 34.1%)
CIE-LAB	lab(38.65, 15.63, -47.11)
CIE-LCH	lch(38.65, 49.64, 288.35°)
OKLab	oklab(47.66% -0.0109 -0.1349)
OKLCH	oklch(47.66% 0.135 265.4)
XYZ	xyz(12.0492, 10.4546, 38.4211)
Luminance	0.1046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757A8 #A88837

analogous

#378FA8 #3757A8 #4F37A8

triadic

#3757A8 #A83757 #57A837

tetradic

#3757A8 #A8378F #A88837 #37A84F

square

#3757A8 #A8378F #A88837 #37A84F

split-complementary

#3757A8 #A84F37 #8FA837

monochromatic

#19274C #283F7A #3757A8 #5575C7 #839BD6

Accessibility & contrast

On white

6.79

#3757A8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#3757A8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757A8

6.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757A8	#FFFFFF	#000000	##FFFFFF
##3757A8	1.00	6.79	3.09	6.79
#FFFFFF	6.79	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D60AB

Deuteranopia (green-blind)

#1456A6

Tritanopia (blue-blind)

#006A77

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3757a8;
/* rgb */ color: rgb(55, 87, 168);
/* oklch */ color: oklch(47.7% 0.135 265.4);

Tailwind

colors: {
  custom: {
    50: '#7a85c2',
    500: '#3757a8',
    950: '#000000',
  },
}

SCSS

$custom: #3757a8;
$custom-light: #7a85c2;
$custom-dark: #000000;

JSON

{
  "hex": "#3757a8",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 168
  },
  "hsl": {
    "h": 223.009,
    "s": 50.673,
    "l": 43.725
  },
  "oklch": {
    "l": 0.47656,
    "c": 0.13537,
    "h": 265.4
  },
  "luminance": 0.10456
}

Semantic roles & 50–950 ramp

primary

#3757A8

secondary

#C0AC7B

accent

#B24EDA

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #3757A8

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →