#3951B4#3951B4

#3951B4 is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.4% C 0.159 H 269.2°. Best body text is #FFFFFF at 6.98:1 contrast (WCAG AA passes).

Color values

HEX	#3951B4
RGB	rgb(57, 81, 180)
HSL	hsl(228, 52%, 46%)
HSV	hsv(228, 68%, 71%)
CMYK	cmyk(68.3%, 55%, 0%, 29.4%)
CIE-LAB	lab(37.93, 24.27, -55.36)
CIE-LCH	lch(37.93, 60.45, 293.67°)
OKLab	oklab(47.4% -0.0023 -0.1593)
OKLCH	oklch(47.4% 0.159 269.2)
XYZ	xyz(12.8652, 10.0488, 44.4328)
Luminance	0.1005 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3951B4 #B49C39

analogous

#398FB4 #3951B4 #5F39B4

triadic

#3951B4 #B43951 #51B439

tetradic

#3951B4 #B4398F #B49C39 #39B45F

square

#3951B4 #B4398F #B49C39 #39B45F

split-complementary

#3951B4 #B45F39 #8FB439

monochromatic

#1C2757 #2A3C86 #3951B4 #5E74CC #8D9CDB

Accessibility & contrast

On white

6.98

#3951B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.01

#3951B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3951B4

6.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3951B4	#FFFFFF	#000000	##FFFFFF
##3951B4	1.00	6.98	3.01	6.98
#FFFFFF	6.98	1.00	21.00	1.00
#000000	3.01	21.00	1.00	21.00
##FFFFFF	6.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FB7

Deuteranopia (green-blind)

#0054B2

Tritanopia (blue-blind)

#00697A

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3951b4;
/* rgb */ color: rgb(57, 81, 180);
/* oklch */ color: oklch(47.4% 0.159 269.2);

Tailwind

colors: {
  custom: {
    50: '#7e81cb',
    500: '#3951b4',
    950: '#000000',
  },
}

SCSS

$custom: #3951b4;
$custom-light: #7e81cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3951b4",
  "rgb": {
    "r": 57,
    "g": 81,
    "b": 180
  },
  "hsl": {
    "h": 228.293,
    "s": 51.899,
    "l": 46.471
  },
  "oklch": {
    "l": 0.47404,
    "c": 0.15928,
    "h": 269.2
  },
  "luminance": 0.1005
}

Semantic roles & 50–950 ramp

primary

#3951B4

secondary

#C5B883

accent

#BF4CDB

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3951B4

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

Preview Lab → · Contrast checker → · Palette generator →