#3971C5#3971C5

#3971C5 is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.4% C 0.144 H 258.4°. Best body text is #FFFFFF at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#3971C5
RGB	rgb(57, 113, 197)
HSL	hsl(216, 55%, 50%)
HSV	hsv(216, 71%, 77%)
CMYK	cmyk(71.1%, 42.6%, 0%, 22.7%)
CIE-LAB	lab(47.89, 9.95, -49.23)
CIE-LCH	lch(47.89, 50.22, 281.43°)
OKLab	oklab(55.37% -0.0288 -0.1407)
OKLCH	oklch(55.37% 0.144 258.4)
XYZ	xyz(17.6669, 16.7094, 55.1067)
Luminance	0.1671 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971C5 #C58D39

analogous

#39B7C5 #3971C5 #4739C5

triadic

#3971C5 #C53971 #71C539

tetradic

#3971C5 #C539B7 #C58D39 #39C547

square

#3971C5 #C539B7 #C58D39 #39C547

split-complementary

#3971C5 #C54739 #B7C539

monochromatic

#1E3B66 #2B5696 #3971C5 #6893D3 #97B5E1

Accessibility & contrast

On white

4.84

#3971C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#3971C5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971C5

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971C5	#FFFFFF	#000000	##FFFFFF
##3971C5	1.00	4.84	4.34	4.84
#FFFFFF	4.84	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4879C8

Deuteranopia (green-blind)

#306CC3

Tritanopia (blue-blind)

#008591

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3971c5;
/* rgb */ color: rgb(57, 113, 197);
/* oklch */ color: oklch(55.4% 0.144 258.4);

Tailwind

colors: {
  custom: {
    50: '#8099d7',
    500: '#3971c5',
    950: '#000000',
  },
}

SCSS

$custom: #3971c5;
$custom-light: #8099d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3971c5",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 197
  },
  "hsl": {
    "h": 216,
    "s": 55.118,
    "l": 49.804
  },
  "oklch": {
    "l": 0.55369,
    "c": 0.1436,
    "h": 258.4
  },
  "luminance": 0.16711
}

Semantic roles & 50–950 ramp

primary

#3971C5

secondary

#CDB38D

accent

#A349DE

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3971C5

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

Preview Lab → · Contrast checker → · Palette generator →