#3978B4#3978B4

#3978B4 is a mid, moderate cyan. Relative luminance 0.176; OKLCH L 55.9% C 0.114 H 249.6°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3978B4
RGB	rgb(57, 120, 180)
HSL	hsl(209, 52%, 46%)
HSV	hsv(209, 68%, 71%)
CMYK	cmyk(68.3%, 33.3%, 0%, 29.4%)
CIE-LAB	lab(49.00, -0.48, -37.66)
CIE-LCH	lch(49.00, 37.66, 269.27°)
OKLab	oklab(55.94% -0.0397 -0.1067)
OKLCH	oklch(55.94% 0.114 249.6)
XYZ	xyz(16.6390, 17.5963, 45.6907)
Luminance	0.1760 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978B4 #B47539

analogous

#39B4B3 #3978B4 #393BB4

triadic

#3978B4 #B43978 #78B439

tetradic

#3978B4 #B339B4 #B47539 #3BB439

square

#3978B4 #B339B4 #B47539 #3BB439

split-complementary

#3978B4 #B4393B #B4B339

monochromatic

#1C3A57 #2A5986 #3978B4 #5E96CC #8DB5DB

Accessibility & contrast

On white

4.65

#3978B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3978B4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3978B4

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978B4	#FFFFFF	#000000	##FFFFFF
##3978B4	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7BB7

Deuteranopia (green-blind)

#4C6FB3

Tritanopia (blue-blind)

#00868E

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3978b4;
/* rgb */ color: rgb(57, 120, 180);
/* oklch */ color: oklch(55.9% 0.114 249.6);

Tailwind

colors: {
  custom: {
    50: '#7d9ecb',
    500: '#3978b4',
    950: '#000000',
  },
}

SCSS

$custom: #3978b4;
$custom-light: #7d9ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#3978b4",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 180
  },
  "hsl": {
    "h": 209.268,
    "s": 51.899,
    "l": 46.471
  },
  "oklch": {
    "l": 0.55935,
    "c": 0.11386,
    "h": 249.6
  },
  "luminance": 0.17598
}

Semantic roles & 50–950 ramp

primary

#3978B4

secondary

#C5A483

accent

#924CDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3978B4

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

Preview Lab → · Contrast checker → · Palette generator →