#3757DA#3757DA

#3757DA is a mid, highly saturated blue. Relative luminance 0.127; OKLCH L 51.5% C 0.203 H 267.9°. Best body text is #FFFFFF at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#3757DA
RGB	rgb(55, 87, 218)
HSL	hsl(228, 69%, 54%)
HSV	hsv(228, 75%, 85%)
CMYK	cmyk(74.8%, 60.1%, 0%, 14.5%)
CIE-LAB	lab(42.29, 33.92, -70.32)
CIE-LCH	lch(42.29, 78.07, 295.75°)
OKLab	oklab(51.55% -0.0076 -0.2031)
OKLCH	oklch(51.55% 0.203 267.9)
XYZ	xyz(17.6342, 12.6886, 67.8359)
Luminance	0.1269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757DA #DABA37

analogous

#37A8DA #3757DA #6837DA

triadic

#3757DA #DA3757 #57DA37

tetradic

#3757DA #DA37A8 #DABA37 #37DA68

square

#3757DA #DA37A8 #DABA37 #37DA68

split-complementary

#3757DA #DA6837 #A8DA37

monochromatic

#182C7F #213EB3 #3757DA #6B82E4 #9EAEED

Accessibility & contrast

On white

5.94

#3757DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#3757DA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757DA

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757DA	#FFFFFF	#000000	##FFFFFF
##3757DA	1.00	5.94	3.54	5.94
#FFFFFF	5.94	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CDE

Deuteranopia (green-blind)

#005CD7

Tritanopia (blue-blind)

#007890

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3757da;
/* rgb */ color: rgb(55, 87, 218);
/* oklch */ color: oklch(51.5% 0.203 267.9);

Tailwind

colors: {
  custom: {
    50: '#8586e6',
    500: '#3757da',
    950: '#000000',
  },
}

SCSS

$custom: #3757da;
$custom-light: #8586e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3757da",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 218
  },
  "hsl": {
    "h": 228.221,
    "s": 68.776,
    "l": 53.529
  },
  "oklch": {
    "l": 0.5155,
    "c": 0.20329,
    "h": 267.9
  },
  "luminance": 0.12691
}

Semantic roles & 50–950 ramp

primary

#3757DA

secondary

#D9CC93

accent

#C93CEC

background

#F9F8FE

surface

#F1EFFD

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3757DA

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

Preview Lab → · Contrast checker → · Palette generator →