#3657DA#3657DA

#3657DA is a mid, highly saturated blue. Relative luminance 0.127; OKLCH L 51.5% C 0.204 H 267.6°. Best body text is #FFFFFF at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#3657DA
RGB	rgb(54, 87, 218)
HSL	hsl(228, 69%, 53%)
HSV	hsv(228, 75%, 85%)
CMYK	cmyk(75.2%, 60.1%, 0%, 14.5%)
CIE-LAB	lab(42.25, 33.81, -70.39)
CIE-LCH	lch(42.25, 78.09, 295.66°)
OKLab	oklab(51.51% -0.0084 -0.2034)
OKLCH	oklch(51.51% 0.204 267.6)
XYZ	xyz(17.5800, 12.6607, 67.8333)
Luminance	0.1266 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3657DA #DAB936

analogous

#36A9DA #3657DA #6736DA

triadic

#3657DA #DA3657 #57DA36

tetradic

#3657DA #DA36A9 #DAB936 #36DA67

square

#3657DA #DA36A9 #DAB936 #36DA67

split-complementary

#3657DA #DA6736 #A9DA36

monochromatic

#172C7E #213EB2 #3657DA #6A82E4 #9DADED

Accessibility & contrast

On white

5.94

#3657DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#3657DA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3657DA

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3657DA	#FFFFFF	#000000	##FFFFFF
##3657DA	1.00	5.94	3.53	5.94
#FFFFFF	5.94	1.00	21.00	1.00
#000000	3.53	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: #3657da;
/* rgb */ color: rgb(54, 87, 218);
/* oklch */ color: oklch(51.5% 0.204 267.6);

Tailwind

colors: {
  custom: {
    50: '#8586e6',
    500: '#3657da',
    950: '#000000',
  },
}

SCSS

$custom: #3657da;
$custom-light: #8586e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3657da",
  "rgb": {
    "r": 54,
    "g": 87,
    "b": 218
  },
  "hsl": {
    "h": 227.927,
    "s": 68.908,
    "l": 53.333
  },
  "oklch": {
    "l": 0.51507,
    "c": 0.20356,
    "h": 267.6
  },
  "luminance": 0.12663
}

Semantic roles & 50–950 ramp

primary

#3657DA

secondary

#D9CB93

accent

#C83CEC

background

#F9F8FE

surface

#F1EFFD

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3657DA

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

Preview Lab → · Contrast checker → · Palette generator →