#3957B5#3957B5

#3957B5 is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.7% C 0.153 H 267.2°. Best body text is #FFFFFF at 6.55:1 contrast (WCAG AA passes).

Color values

HEX	#3957B5
RGB	rgb(57, 87, 181)
HSL	hsl(225, 52%, 47%)
HSV	hsv(225, 69%, 71%)
CMYK	cmyk(68.5%, 51.9%, 0%, 29%)
CIE-LAB	lab(39.62, 20.72, -53.23)
CIE-LCH	lch(39.62, 57.12, 291.27°)
OKLab	oklab(48.7% -0.0075 -0.1529)
OKLCH	oklch(48.7% 0.153 267.2)
XYZ	xyz(13.4331, 11.0211, 45.1265)
Luminance	0.1102 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957B5 #B59739

analogous

#3995B5 #3957B5 #5939B5

triadic

#3957B5 #B53957 #57B539

tetradic

#3957B5 #B53995 #B59739 #39B559

square

#3957B5 #B53995 #B59739 #39B559

split-complementary

#3957B5 #B55939 #95B539

monochromatic

#1C2A58 #2A4186 #3957B5 #5F79CD #8DA0DB

Accessibility & contrast

On white

6.55

#3957B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.20

#3957B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957B5

6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957B5	#FFFFFF	#000000	##FFFFFF
##3957B5	1.00	6.55	3.20	6.55
#FFFFFF	6.55	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C63B8

Deuteranopia (green-blind)

#0058B3

Tritanopia (blue-blind)

#006D7D

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3957b5;
/* rgb */ color: rgb(57, 87, 181);
/* oklch */ color: oklch(48.7% 0.153 267.2);

Tailwind

colors: {
  custom: {
    50: '#7e85cc',
    500: '#3957b5',
    950: '#000000',
  },
}

SCSS

$custom: #3957b5;
$custom-light: #7e85cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3957b5",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 181
  },
  "hsl": {
    "h": 225.484,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.487,
    "c": 0.15305,
    "h": 267.2
  },
  "luminance": 0.11022
}

Semantic roles & 50–950 ramp

primary

#3957B5

secondary

#C6B684

accent

#B94CDC

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3957B5

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

Preview Lab → · Contrast checker → · Palette generator →