#3971B3#3971B3

#3971B3 is a mid, moderate cyan. Relative luminance 0.159; OKLCH L 54.3% C 0.119 H 254.0°. Best body text is #FFFFFF at 5.02:1 contrast (WCAG AA passes).

Color values

HEX	#3971B3
RGB	rgb(57, 113, 179)
HSL	hsl(212, 52%, 46%)
HSV	hsv(212, 68%, 70%)
CMYK	cmyk(68.2%, 36.9%, 0%, 29.8%)
CIE-LAB	lab(46.89, 3.43, -40.42)
CIE-LCH	lch(46.89, 40.57, 274.85°)
OKLab	oklab(54.26% -0.0329 -0.1149)
OKLCH	oklch(54.26% 0.119 254)
XYZ	xyz(15.7262, 15.9332, 44.8857)
Luminance	0.1593 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971B3 #B37B39

analogous

#39AEB3 #3971B3 #3E39B3

triadic

#3971B3 #B33971 #71B339

tetradic

#3971B3 #B339AE #B37B39 #39B33E

square

#3971B3 #B339AE #B37B39 #39B33E

split-complementary

#3971B3 #B33E39 #AEB339

monochromatic

#1B3656 #2A5485 #3971B3 #5E90CC #8CB0DA

Accessibility & contrast

On white

5.02

#3971B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.19

#3971B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971B3

5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971B3	#FFFFFF	#000000	##FFFFFF
##3971B3	1.00	5.02	4.19	5.02
#FFFFFF	5.02	1.00	21.00	1.00
#000000	4.19	21.00	1.00	21.00
##FFFFFF	5.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5475B6

Deuteranopia (green-blind)

#426AB2

Tritanopia (blue-blind)

#008089

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #3971b3;
/* rgb */ color: rgb(57, 113, 179);
/* oklch */ color: oklch(54.3% 0.119 254.0);

Tailwind

colors: {
  custom: {
    50: '#7d99ca',
    500: '#3971b3',
    950: '#000000',
  },
}

SCSS

$custom: #3971b3;
$custom-light: #7d99ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3971b3",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 179
  },
  "hsl": {
    "h": 212.459,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.5426,
    "c": 0.11949,
    "h": 254
  },
  "luminance": 0.15935
}

Semantic roles & 50–950 ramp

primary

#3971B3

secondary

#C5A783

accent

#9A4DDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3971B3

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

Preview Lab → · Contrast checker → · Palette generator →