#3657CF#3657CF

#3657CF is a mid, vivid blue. Relative luminance 0.121; OKLCH L 50.6% C 0.189 H 267.4°. Best body text is #FFFFFF at 6.14:1 contrast (WCAG AA passes).

Color values

HEX	#3657CF
RGB	rgb(54, 87, 207)
HSL	hsl(227, 61%, 51%)
HSV	hsv(227, 74%, 81%)
CMYK	cmyk(73.9%, 58%, 0%, 18.8%)
CIE-LAB	lab(41.38, 29.82, -65.49)
CIE-LCH	lch(41.38, 71.96, 294.48°)
OKLab	oklab(50.59% -0.0086 -0.189)
OKLCH	oklch(50.59% 0.189 267.4)
XYZ	xyz(16.1881, 12.1039, 60.5025)
Luminance	0.1211 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3657CF #CFAE36

analogous

#36A3CF #3657CF #6136CF

triadic

#3657CF #CF3657 #57CF36

tetradic

#3657CF #CF36A3 #CFAE36 #36CF61

square

#3657CF #CF36A3 #CFAE36 #36CF61

split-complementary

#3657CF #CF6136 #A3CF36

monochromatic

#1B2D70 #2741A1 #3657CF #6780DB #99AAE7

Accessibility & contrast

On white

6.14

#3657CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.42

#3657CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3657CF

6.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3657CF	#FFFFFF	#000000	##FFFFFF
##3657CF	1.00	6.14	3.42	6.14
#FFFFFF	6.14	1.00	21.00	1.00
#000000	3.42	21.00	1.00	21.00
##FFFFFF	6.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069D3

Deuteranopia (green-blind)

#005BCD

Tritanopia (blue-blind)

#00758A

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3657cf;
/* rgb */ color: rgb(54, 87, 207);
/* oklch */ color: oklch(50.6% 0.189 267.4);

Tailwind

colors: {
  custom: {
    50: '#8286df',
    500: '#3657cf',
    950: '#000000',
  },
}

SCSS

$custom: #3657cf;
$custom-light: #8286df;
$custom-dark: #000000;

JSON

{
  "hex": "#3657cf",
  "rgb": {
    "r": 54,
    "g": 87,
    "b": 207
  },
  "hsl": {
    "h": 227.059,
    "s": 61.446,
    "l": 51.176
  },
  "oklch": {
    "l": 0.50591,
    "c": 0.18921,
    "h": 267.4
  },
  "luminance": 0.12106
}

Semantic roles & 50–950 ramp

primary

#3657CF

secondary

#D2C48F

accent

#C243E5

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3657CF

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

Preview Lab → · Contrast checker → · Palette generator →