#3657BB#3657BB

#3657BB is a mid, vivid blue. Relative luminance 0.112; OKLCH L 49.0% C 0.162 H 266.6°. Best body text is #FFFFFF at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#3657BB
RGB	rgb(54, 87, 187)
HSL	hsl(225, 55%, 47%)
HSV	hsv(225, 71%, 73%)
CMYK	cmyk(71.1%, 53.5%, 0%, 26.7%)
CIE-LAB	lab(39.89, 22.48, -56.30)
CIE-LCH	lch(39.89, 60.62, 291.77°)
OKLab	oklab(49.01% -0.0097 -0.162)
OKLCH	oklch(49.01% 0.162 266.6)
XYZ	xyz(13.8960, 11.1871, 48.4311)
Luminance	0.1119 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3657BB #BB9A36

analogous

#369ABB #3657BB #5836BB

triadic

#3657BB #BB3657 #57BB36

tetradic

#3657BB #BB369A #BB9A36 #36BB58

square

#3657BB #BB369A #BB9A36 #36BB58

split-complementary

#3657BB #BB5836 #9ABB36

monochromatic

#1B2B5C #28418C #3657BB #5E7AD0 #8DA1DE

Accessibility & contrast

On white

6.49

#3657BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.24

#3657BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3657BB

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3657BB	#FFFFFF	#000000	##FFFFFF
##3657BB	1.00	6.49	3.24	6.49
#FFFFFF	6.49	1.00	21.00	1.00
#000000	3.24	21.00	1.00	21.00
##FFFFFF	6.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D64BF

Deuteranopia (green-blind)

#0058B9

Tritanopia (blue-blind)

#006F80

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3657bb;
/* rgb */ color: rgb(54, 87, 187);
/* oklch */ color: oklch(49.0% 0.162 266.6);

Tailwind

colors: {
  custom: {
    50: '#7e85d0',
    500: '#3657bb',
    950: '#000000',
  },
}

SCSS

$custom: #3657bb;
$custom-light: #7e85d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3657bb",
  "rgb": {
    "r": 54,
    "g": 87,
    "b": 187
  },
  "hsl": {
    "h": 225.113,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.49005,
    "c": 0.16227,
    "h": 266.6
  },
  "luminance": 0.11189
}

Semantic roles & 50–950 ramp

primary

#3657BB

secondary

#C9B884

accent

#B949DF

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3657BB

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

Preview Lab → · Contrast checker → · Palette generator →