#3978CE#3978CE

#3978CE is a mid, vivid cyan. Relative luminance 0.188; OKLCH L 57.5% C 0.148 H 257.0°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3978CE
RGB	rgb(57, 120, 206)
HSL	hsl(215, 60%, 52%)
HSV	hsv(215, 72%, 81%)
CMYK	cmyk(72.3%, 41.7%, 0%, 19.2%)
CIE-LAB	lab(50.40, 8.89, -50.36)
CIE-LCH	lch(50.40, 51.14, 280.01°)
OKLab	oklab(57.48% -0.0333 -0.1439)
OKLCH	oklch(57.48% 0.148 257)
XYZ	xyz(19.5403, 18.7569, 60.9712)
Luminance	0.1876 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978CE #CE8F39

analogous

#39C3CE #3978CE #4539CE

triadic

#3978CE #CE3978 #78CE39

tetradic

#3978CE #CE39C3 #CE8F39 #39CE45

square

#3978CE #CE39C3 #CE8F39 #39CE45

split-complementary

#3978CE #CE4539 #C3CE39

monochromatic

#1C4071 #285CA2 #3978CE #6A99DA #9BBBE6

Accessibility & contrast

On white

4.42

#3978CE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#3978CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3978CE

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978CE	#FFFFFF	#000000	##000000
##3978CE	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F7FD1

Deuteranopia (green-blind)

#3572CC

Tritanopia (blue-blind)

#008C99

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3978ce;
/* rgb */ color: rgb(57, 120, 206);
/* oklch */ color: oklch(57.5% 0.148 257.0);

Tailwind

colors: {
  custom: {
    50: '#829edd',
    500: '#3978ce',
    950: '#000000',
  },
}

SCSS

$custom: #3978ce;
$custom-light: #829edd;
$custom-dark: #000000;

JSON

{
  "hex": "#3978ce",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 206
  },
  "hsl": {
    "h": 214.631,
    "s": 60.324,
    "l": 51.569
  },
  "oklch": {
    "l": 0.57482,
    "c": 0.14771,
    "h": 257
  },
  "luminance": 0.18759
}

Semantic roles & 50–950 ramp

primary

#3978CE

secondary

#D2B691

accent

#A044E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3978CE

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

Preview Lab → · Contrast checker → · Palette generator →