#3971BC#3971BC

#3971BC is a mid, vivid cyan. Relative luminance 0.163; OKLCH L 54.8% C 0.132 H 256.5°. Best body text is #FFFFFF at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#3971BC
RGB	rgb(57, 113, 188)
HSL	hsl(214, 53%, 48%)
HSV	hsv(214, 70%, 74%)
CMYK	cmyk(69.7%, 39.9%, 0%, 26.3%)
CIE-LAB	lab(47.38, 6.68, -44.86)
CIE-LCH	lch(47.38, 45.35, 278.47°)
OKLab	oklab(54.8% -0.0307 -0.1279)
OKLCH	oklch(54.8% 0.132 256.5)
XYZ	xyz(16.6663, 16.3092, 49.8369)
Luminance	0.1631 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971BC #BC8439

analogous

#39B2BC #3971BC #4239BC

triadic

#3971BC #BC3971 #71BC39

tetradic

#3971BC #BC39B2 #BC8439 #39BC42

square

#3971BC #BC39B2 #BC8439 #39BC42

split-complementary

#3971BC #BC4239 #B2BC39

monochromatic

#1D395E #2B558D #3971BC #6391D0 #92B2DE

Accessibility & contrast

On white

4.93

#3971BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.26

#3971BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971BC

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971BC	#FFFFFF	#000000	##FFFFFF
##3971BC	1.00	4.93	4.26	4.93
#FFFFFF	4.93	1.00	21.00	1.00
#000000	4.26	21.00	1.00	21.00
##FFFFFF	4.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E77BF

Deuteranopia (green-blind)

#3A6BBA

Tritanopia (blue-blind)

#00828D

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3971bc;
/* rgb */ color: rgb(57, 113, 188);
/* oklch */ color: oklch(54.8% 0.132 256.5);

Tailwind

colors: {
  custom: {
    50: '#7e99d0',
    500: '#3971bc',
    950: '#000000',
  },
}

SCSS

$custom: #3971bc;
$custom-light: #7e99d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3971bc",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 188
  },
  "hsl": {
    "h": 214.351,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.54803,
    "c": 0.1315,
    "h": 256.5
  },
  "luminance": 0.16311
}

Semantic roles & 50–950 ramp

primary

#3971BC

secondary

#C9AD88

accent

#9E4BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3971BC

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

Preview Lab → · Contrast checker → · Palette generator →