#3957CC#3957CC

#3957CC is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.5% C 0.184 H 268.1°. Best body text is #FFFFFF at 6.16:1 contrast (WCAG AA passes).

Color values

HEX	#3957CC
RGB	rgb(57, 87, 204)
HSL	hsl(228, 59%, 51%)
HSV	hsv(228, 72%, 80%)
CMYK	cmyk(72.1%, 57.4%, 0%, 20%)
CIE-LAB	lab(41.29, 29.10, -63.91)
CIE-LCH	lch(41.29, 70.22, 294.48°)
OKLab	oklab(50.49% -0.006 -0.1843)
OKLCH	oklch(50.49% 0.184 268.1)
XYZ	xyz(15.9909, 12.0442, 58.5971)
Luminance	0.1205 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957CC #CCAE39

analogous

#39A0CC #3957CC #6439CC

triadic

#3957CC #CC3957 #57CC39

tetradic

#3957CC #CC39A0 #CCAE39 #39CC64

square

#3957CC #CC39A0 #CCAE39 #39CC64

split-complementary

#3957CC #CC6439 #A0CC39

monochromatic

#1C2D6E #29419F #3957CC #6A80D9 #9AAAE5

Accessibility & contrast

On white

6.16

#3957CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.41

#3957CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957CC

6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957CC	#FFFFFF	#000000	##FFFFFF
##3957CC	1.00	6.16	3.41	6.16
#FFFFFF	6.16	1.00	21.00	1.00
#000000	3.41	21.00	1.00	21.00
##FFFFFF	6.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D0

Deuteranopia (green-blind)

#005BCA

Tritanopia (blue-blind)

#007489

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3957cc;
/* rgb */ color: rgb(57, 87, 204);
/* oklch */ color: oklch(50.5% 0.184 268.1);

Tailwind

colors: {
  custom: {
    50: '#8386dc',
    500: '#3957cc',
    950: '#000000',
  },
}

SCSS

$custom: #3957cc;
$custom-light: #8386dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3957cc",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 204
  },
  "hsl": {
    "h": 227.755,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.50485,
    "c": 0.1844,
    "h": 268.1
  },
  "luminance": 0.12046
}

Semantic roles & 50–950 ramp

primary

#3957CC

secondary

#D1C490

accent

#C246E2

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3957CC

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

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