#3757A3#3757A3

#3757A3 is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.3% C 0.128 H 264.8°. Best body text is #FFFFFF at 6.87:1 contrast (WCAG AA passes).

Color values

HEX	#3757A3
RGB	rgb(55, 87, 163)
HSL	hsl(222, 50%, 43%)
HSV	hsv(222, 66%, 64%)
CMYK	cmyk(66.3%, 46.6%, 0%, 36.1%)
CIE-LAB	lab(38.33, 13.80, -44.65)
CIE-LCH	lch(38.33, 46.73, 287.17°)
OKLab	oklab(47.31% -0.0117 -0.1277)
OKLCH	oklch(47.31% 0.128 264.8)
XYZ	xyz(11.5923, 10.2719, 36.0150)
Luminance	0.1027 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757A3 #A38337

analogous

#378DA3 #3757A3 #4D37A3

triadic

#3757A3 #A33757 #57A337

tetradic

#3757A3 #A3378D #A38337 #37A34D

square

#3757A3 #A3378D #A38337 #37A34D

split-complementary

#3757A3 #A34D37 #8DA337

monochromatic

#182647 #283F75 #3757A3 #5274C5 #8099D4

Accessibility & contrast

On white

6.87

#3757A3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#3757A3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757A3

6.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757A3	#FFFFFF	#000000	##FFFFFF
##3757A3	1.00	6.87	3.05	6.87
#FFFFFF	6.87	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#315FA6

Deuteranopia (green-blind)

#1D56A1

Tritanopia (blue-blind)

#006875

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3757a3;
/* rgb */ color: rgb(55, 87, 163);
/* oklch */ color: oklch(47.3% 0.128 264.8);

Tailwind

colors: {
  custom: {
    50: '#7985bf',
    500: '#3757a3',
    950: '#000000',
  },
}

SCSS

$custom: #3757a3;
$custom-light: #7985bf;
$custom-dark: #000000;

JSON

{
  "hex": "#3757a3",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 163
  },
  "hsl": {
    "h": 222.222,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.47308,
    "c": 0.12822,
    "h": 264.8
  },
  "luminance": 0.10273
}

Semantic roles & 50–950 ramp

primary

#3757A3

secondary

#BEA978

accent

#B04FD9

background

#F7F8FB

surface

#EEEFF7

border

#C9CAD0

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #3757A3

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

Preview Lab → · Contrast checker → · Palette generator →