#3B57BB#3B57BB

#3B57BB is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.3% C 0.161 H 268.2°. Best body text is #FFFFFF at 6.43:1 contrast (WCAG AA passes).

Color values

HEX	#3B57BB
RGB	rgb(59, 87, 187)
HSL	hsl(227, 52%, 48%)
HSV	hsv(227, 68%, 73%)
CMYK	cmyk(68.4%, 53.5%, 0%, 26.7%)
CIE-LAB	lab(40.14, 23.21, -55.90)
CIE-LCH	lch(40.14, 60.53, 292.55°)
OKLab	oklab(49.25% -0.0051 -0.1607)
OKLCH	oklch(49.25% 0.161 268.2)
XYZ	xyz(14.1784, 11.3327, 48.4443)
Luminance	0.1133 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B57BB #BB9F3B

analogous

#3B97BB #3B57BB #5F3BBB

triadic

#3B57BB #BB3B57 #57BB3B

tetradic

#3B57BB #BB3B97 #BB9F3B #3BBB5F

square

#3B57BB #BB3B97 #BB9F3B #3BBB5F

split-complementary

#3B57BB #BB5F3B #97BB3B

monochromatic

#1E2C5E #2C418C #3B57BB #657CCE #93A3DD

Accessibility & contrast

On white

6.43

#3B57BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#3B57BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B57BB

6.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B57BB	#FFFFFF	#000000	##FFFFFF
##3B57BB	1.00	6.43	3.27	6.43
#FFFFFF	6.43	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1065BF

Deuteranopia (green-blind)

#0059B9

Tritanopia (blue-blind)

#006F80

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3b57bb;
/* rgb */ color: rgb(59, 87, 187);
/* oklch */ color: oklch(49.3% 0.161 268.2);

Tailwind

colors: {
  custom: {
    50: '#8086d0',
    500: '#3b57bb',
    950: '#000000',
  },
}

SCSS

$custom: #3b57bb;
$custom-light: #8086d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3b57bb",
  "rgb": {
    "r": 59,
    "g": 87,
    "b": 187
  },
  "hsl": {
    "h": 226.875,
    "s": 52.033,
    "l": 48.235
  },
  "oklch": {
    "l": 0.49253,
    "c": 0.16078,
    "h": 268.2
  },
  "luminance": 0.11334
}

Semantic roles & 50–950 ramp

primary

#3B57BB

secondary

#C8BB8A

accent

#BC4CDB

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3B57BB

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

Preview Lab → · Contrast checker → · Palette generator →