#3957B1#3957B1

#3957B1 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.4% C 0.147 H 266.9°. Best body text is #FFFFFF at 6.62:1 contrast (WCAG AA passes).

Color values

HEX	#3957B1
RGB	rgb(57, 87, 177)
HSL	hsl(225, 51%, 46%)
HSV	hsv(225, 68%, 69%)
CMYK	cmyk(67.8%, 50.8%, 0%, 30.6%)
CIE-LAB	lab(39.34, 19.26, -51.31)
CIE-LCH	lch(39.34, 54.81, 290.57°)
OKLab	oklab(48.41% -0.0079 -0.1472)
OKLCH	oklch(48.41% 0.147 266.9)
XYZ	xyz(13.0286, 10.8593, 42.9959)
Luminance	0.1086 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957B1 #B19339

analogous

#3993B1 #3957B1 #5739B1

triadic

#3957B1 #B13957 #57B139

tetradic

#3957B1 #B13993 #B19339 #39B157

square

#3957B1 #B13993 #B19339 #39B157

split-complementary

#3957B1 #B15739 #93B139

monochromatic

#1B2954 #2A4083 #3957B1 #5D78CB #8B9FDA

Accessibility & contrast

On white

6.62

#3957B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#3957B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957B1

6.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957B1	#FFFFFF	#000000	##FFFFFF
##3957B1	1.00	6.62	3.17	6.62
#FFFFFF	6.62	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2362B4

Deuteranopia (green-blind)

#0057AF

Tritanopia (blue-blind)

#006C7B

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3957b1;
/* rgb */ color: rgb(57, 87, 177);
/* oklch */ color: oklch(48.4% 0.147 266.9);

Tailwind

colors: {
  custom: {
    50: '#7d85c9',
    500: '#3957b1',
    950: '#000000',
  },
}

SCSS

$custom: #3957b1;
$custom-light: #7d85c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3957b1",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 177
  },
  "hsl": {
    "h": 225,
    "s": 51.282,
    "l": 45.882
  },
  "oklch": {
    "l": 0.48405,
    "c": 0.14745,
    "h": 266.9
  },
  "luminance": 0.10861
}

Semantic roles & 50–950 ramp

primary

#3957B1

secondary

#C4B382

accent

#B74DDB

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3957B1

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

Preview Lab → · Contrast checker → · Palette generator →