#3978B5#3978B5

#3978B5 is a mid, moderate cyan. Relative luminance 0.176; OKLCH L 56.0% C 0.115 H 250.0°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3978B5
RGB	rgb(57, 120, 181)
HSL	hsl(210, 52%, 47%)
HSV	hsv(210, 69%, 71%)
CMYK	cmyk(68.5%, 33.7%, 0%, 29%)
CIE-LAB	lab(49.05, -0.13, -38.16)
CIE-LCH	lch(49.05, 38.16, 269.81°)
OKLab	oklab(55.99% -0.0394 -0.1082)
OKLCH	oklch(55.99% 0.115 250)
XYZ	xyz(16.7412, 17.6372, 46.2291)
Luminance	0.1764 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978B5 #B57639

analogous

#39B5B4 #3978B5 #393AB5

triadic

#3978B5 #B53978 #78B539

tetradic

#3978B5 #B439B5 #B57639 #3AB539

square

#3978B5 #B439B5 #B57639 #3AB539

split-complementary

#3978B5 #B5393A #B5B439

monochromatic

#1C3A58 #2A5986 #3978B5 #5F96CD #8DB5DB

Accessibility & contrast

On white

4.64

#3978B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3978B5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3978B5

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978B5	#FFFFFF	#000000	##FFFFFF
##3978B5	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7BB8

Deuteranopia (green-blind)

#4C6FB4

Tritanopia (blue-blind)

#00868E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3978b5;
/* rgb */ color: rgb(57, 120, 181);
/* oklch */ color: oklch(56.0% 0.115 250.0);

Tailwind

colors: {
  custom: {
    50: '#7d9ecb',
    500: '#3978b5',
    950: '#000000',
  },
}

SCSS

$custom: #3978b5;
$custom-light: #7d9ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#3978b5",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 181
  },
  "hsl": {
    "h": 209.516,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.55991,
    "c": 0.11513,
    "h": 250
  },
  "luminance": 0.17639
}

Semantic roles & 50–950 ramp

primary

#3978B5

secondary

#C6A484

accent

#934CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3978B5

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

Preview Lab → · Contrast checker → · Palette generator →