#3971C4#3971C4

#3971C4 is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.3% C 0.142 H 258.2°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#3971C4
RGB	rgb(57, 113, 196)
HSL	hsl(216, 55%, 50%)
HSV	hsv(216, 71%, 77%)
CMYK	cmyk(70.9%, 42.3%, 0%, 23.1%)
CIE-LAB	lab(47.83, 9.59, -48.74)
CIE-LCH	lch(47.83, 49.68, 281.13°)
OKLab	oklab(55.31% -0.029 -0.1393)
OKLCH	oklch(55.31% 0.142 258.2)
XYZ	xyz(17.5527, 16.6638, 54.5052)
Luminance	0.1667 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971C4 #C48C39

analogous

#39B7C4 #3971C4 #4639C4

triadic

#3971C4 #C43971 #71C439

tetradic

#3971C4 #C439B7 #C48C39 #39C446

square

#3971C4 #C439B7 #C48C39 #39C446

split-complementary

#3971C4 #C44639 #B7C439

monochromatic

#1D3A65 #2B5695 #3971C4 #6793D3 #97B5E1

Accessibility & contrast

On white

4.85

#3971C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#3971C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971C4

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971C4	#FFFFFF	#000000	##FFFFFF
##3971C4	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4978C7

Deuteranopia (green-blind)

#326CC2

Tritanopia (blue-blind)

#008491

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3971c4;
/* rgb */ color: rgb(57, 113, 196);
/* oklch */ color: oklch(55.3% 0.142 258.2);

Tailwind

colors: {
  custom: {
    50: '#8099d6',
    500: '#3971c4',
    950: '#000000',
  },
}

SCSS

$custom: #3971c4;
$custom-light: #8099d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3971c4",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 196
  },
  "hsl": {
    "h": 215.827,
    "s": 54.941,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55305,
    "c": 0.14225,
    "h": 258.2
  },
  "luminance": 0.16666
}

Semantic roles & 50–950 ramp

primary

#3971C4

secondary

#CCB38D

accent

#A24ADE

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3971C4

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

Preview Lab → · Contrast checker → · Palette generator →