#3657D9#3657D9

#3657D9 is a mid, highly saturated blue. Relative luminance 0.126; OKLCH L 51.4% C 0.202 H 267.6°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#3657D9
RGB	rgb(54, 87, 217)
HSL	hsl(228, 68%, 53%)
HSV	hsv(228, 75%, 85%)
CMYK	cmyk(75.1%, 59.9%, 0%, 14.9%)
CIE-LAB	lab(42.17, 33.45, -69.95)
CIE-LCH	lch(42.17, 77.54, 295.56°)
OKLab	oklab(51.42% -0.0084 -0.2021)
OKLCH	oklch(51.42% 0.202 267.6)
XYZ	xyz(17.4495, 12.6085, 67.1462)
Luminance	0.1261 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3657D9 #D9B836

analogous

#36A8D9 #3657D9 #6636D9

triadic

#3657D9 #D93657 #57D936

tetradic

#3657D9 #D936A8 #D9B836 #36D966

square

#3657D9 #D936A8 #D9B836 #36D966

split-complementary

#3657D9 #D96636 #A8D936

monochromatic

#182C7D #213EB0 #3657D9 #6982E3 #9DADEC

Accessibility & contrast

On white

5.96

#3657D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#3657D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3657D9

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3657D9	#FFFFFF	#000000	##FFFFFF
##3657D9	1.00	5.96	3.52	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BDD

Deuteranopia (green-blind)

#005CD6

Tritanopia (blue-blind)

#007890

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3657d9;
/* rgb */ color: rgb(54, 87, 217);
/* oklch */ color: oklch(51.4% 0.202 267.6);

Tailwind

colors: {
  custom: {
    50: '#8486e6',
    500: '#3657d9',
    950: '#000000',
  },
}

SCSS

$custom: #3657d9;
$custom-light: #8486e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3657d9",
  "rgb": {
    "r": 54,
    "g": 87,
    "b": 217
  },
  "hsl": {
    "h": 227.853,
    "s": 68.201,
    "l": 53.137
  },
  "oklch": {
    "l": 0.51422,
    "c": 0.20227,
    "h": 267.6
  },
  "luminance": 0.1261
}

Semantic roles & 50–950 ramp

primary

#3657D9

secondary

#D9CA92

accent

#C83DEB

background

#F8F8FE

surface

#F0EFFC

border

#CBCAD5

text

#0D0B16

muted

#7D7C84

Preview Lab

Preview with #3657D9

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

Preview Lab → · Contrast checker → · Palette generator →