#3978AB#3978AB

#3978AB is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.4% C 0.103 H 245.6°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3978AB
RGB	rgb(57, 120, 171)
HSL	hsl(207, 50%, 45%)
HSV	hsv(207, 67%, 67%)
CMYK	cmyk(66.7%, 29.8%, 0%, 32.9%)
CIE-LAB	lab(48.56, -3.65, -33.13)
CIE-LCH	lch(48.56, 33.33, 263.72°)
OKLab	oklab(55.44% -0.0424 -0.0935)
OKLCH	oklch(55.44% 0.103 245.6)
XYZ	xyz(15.7517, 17.2415, 41.0180)
Luminance	0.1724 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978AB #AB6C39

analogous

#39ABA5 #3978AB #393FAB

triadic

#3978AB #AB3978 #78AB39

tetradic

#3978AB #A539AB #AB6C39 #3FAB39

square

#3978AB #A539AB #AB6C39 #3FAB39

split-complementary

#3978AB #AB393F #ABA539

monochromatic

#1A384F #2A587D #3978AB #5996C8 #87B3D7

Accessibility & contrast

On white

4.72

#3978AB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#3978AB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3978AB

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978AB	#FFFFFF	#000000	##FFFFFF
##3978AB	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6179AD

Deuteranopia (green-blind)

#526EAA

Tritanopia (blue-blind)

#00848A

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3978ab;
/* rgb */ color: rgb(57, 120, 171);
/* oklch */ color: oklch(55.4% 0.103 245.6);

Tailwind

colors: {
  custom: {
    50: '#7c9ec4',
    500: '#3978ab',
    950: '#000000',
  },
}

SCSS

$custom: #3978ab;
$custom-light: #7c9ec4;
$custom-dark: #000000;

JSON

{
  "hex": "#3978ab",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 171
  },
  "hsl": {
    "h": 206.842,
    "s": 50,
    "l": 44.706
  },
  "oklch": {
    "l": 0.55444,
    "c": 0.10269,
    "h": 245.6
  },
  "luminance": 0.17243
}

Semantic roles & 50–950 ramp

primary

#3978AB

secondary

#C19C7F

accent

#8D4EDA

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E12

muted

#7C7E81

Preview Lab

Preview with #3978AB

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

Preview Lab → · Contrast checker → · Palette generator →