#3757D2#3757D2

#3757D2 is a mid, vivid blue. Relative luminance 0.123; OKLCH L 50.9% C 0.193 H 267.7°. Best body text is #FFFFFF at 6.08:1 contrast (WCAG AA passes).

Color values

HEX	#3757D2
RGB	rgb(55, 87, 210)
HSL	hsl(228, 63%, 52%)
HSV	hsv(228, 74%, 82%)
CMYK	cmyk(73.8%, 58.6%, 0%, 17.6%)
CIE-LAB	lab(41.66, 31.03, -66.77)
CIE-LCH	lch(41.66, 73.62, 294.93°)
OKLab	oklab(50.88% -0.0077 -0.1927)
OKLCH	oklch(50.88% 0.193 267.7)
XYZ	xyz(16.6126, 12.2800, 62.4550)
Luminance	0.1228 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757D2 #D2B237

analogous

#37A5D2 #3757D2 #6537D2

triadic

#3757D2 #D23757 #57D237

tetradic

#3757D2 #D237A5 #D2B237 #37D265

square

#3757D2 #D237A5 #D2B237 #37D265

split-complementary

#3757D2 #D26537 #A5D237

monochromatic

#1A2D74 #2540A6 #3757D2 #6981DD #9BABE8

Accessibility & contrast

On white

6.08

#3757D2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.46

#3757D2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757D2

6.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757D2	#FFFFFF	#000000	##FFFFFF
##3757D2	1.00	6.08	3.46	6.08
#FFFFFF	6.08	1.00	21.00	1.00
#000000	3.46	21.00	1.00	21.00
##FFFFFF	6.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD6

Deuteranopia (green-blind)

#005BD0

Tritanopia (blue-blind)

#00768C

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3757d2;
/* rgb */ color: rgb(55, 87, 210);
/* oklch */ color: oklch(50.9% 0.193 267.7);

Tailwind

colors: {
  custom: {
    50: '#8386e1',
    500: '#3757d2',
    950: '#000000',
  },
}

SCSS

$custom: #3757d2;
$custom-light: #8386e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3757d2",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 210
  },
  "hsl": {
    "h": 227.613,
    "s": 63.265,
    "l": 51.961
  },
  "oklch": {
    "l": 0.50882,
    "c": 0.19288,
    "h": 267.7
  },
  "luminance": 0.12282
}

Semantic roles & 50–950 ramp

primary

#3757D2

secondary

#D4C690

accent

#C441E6

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3757D2

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

Preview Lab → · Contrast checker → · Palette generator →