#3657CE#3657CE

#3657CE is a mid, vivid blue. Relative luminance 0.121; OKLCH L 50.5% C 0.188 H 267.4°. Best body text is #FFFFFF at 6.16:1 contrast (WCAG AA passes).

Color values

HEX	#3657CE
RGB	rgb(54, 87, 206)
HSL	hsl(227, 61%, 51%)
HSV	hsv(227, 74%, 81%)
CMYK	cmyk(73.8%, 57.8%, 0%, 19.2%)
CIE-LAB	lab(41.30, 29.46, -65.04)
CIE-LCH	lch(41.30, 71.40, 294.37°)
OKLab	oklab(50.51% -0.0086 -0.1877)
OKLCH	oklch(50.51% 0.188 267.4)
XYZ	xyz(16.0662, 12.0552, 59.8607)
Luminance	0.1206 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3657CE #CEAD36

analogous

#36A3CE #3657CE #6136CE

triadic

#3657CE #CE3657 #57CE36

tetradic

#3657CE #CE36A3 #CEAD36 #36CE61

square

#3657CE #CE36A3 #CEAD36 #36CE61

split-complementary

#3657CE #CE6136 #A3CE36

monochromatic

#1B2D6F #2741A0 #3657CE #6780DA #98A9E6

Accessibility & contrast

On white

6.16

#3657CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.41

#3657CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3657CE

6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3657CE	#FFFFFF	#000000	##FFFFFF
##3657CE	1.00	6.16	3.41	6.16
#FFFFFF	6.16	1.00	21.00	1.00
#000000	3.41	21.00	1.00	21.00
##FFFFFF	6.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069D2

Deuteranopia (green-blind)

#005BCC

Tritanopia (blue-blind)

#00758A

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3657ce;
/* rgb */ color: rgb(54, 87, 206);
/* oklch */ color: oklch(50.5% 0.188 267.4);

Tailwind

colors: {
  custom: {
    50: '#8286de',
    500: '#3657ce',
    950: '#000000',
  },
}

SCSS

$custom: #3657ce;
$custom-light: #8286de;
$custom-dark: #000000;

JSON

{
  "hex": "#3657ce",
  "rgb": {
    "r": 54,
    "g": 87,
    "b": 206
  },
  "hsl": {
    "h": 226.974,
    "s": 60.8,
    "l": 50.98
  },
  "oklch": {
    "l": 0.50509,
    "c": 0.18789,
    "h": 267.4
  },
  "luminance": 0.12057
}

Semantic roles & 50–950 ramp

primary

#3657CE

secondary

#D2C38E

accent

#C144E4

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3657CE

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

Preview Lab → · Contrast checker → · Palette generator →