#3978C4#3978C4

#3978C4 is a mid, vivid cyan. Relative luminance 0.183; OKLCH L 56.9% C 0.135 H 254.7°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3978C4
RGB	rgb(57, 120, 196)
HSL	hsl(213, 55%, 50%)
HSV	hsv(213, 71%, 77%)
CMYK	cmyk(70.9%, 38.8%, 0%, 23.1%)
CIE-LAB	lab(49.84, 5.25, -45.54)
CIE-LCH	lch(49.84, 45.85, 276.58°)
OKLab	oklab(56.87% -0.0355 -0.1298)
OKLCH	oklch(56.87% 0.135 254.7)
XYZ	xyz(18.3640, 18.2863, 54.7756)
Luminance	0.1829 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978C4 #C48539

analogous

#39BEC4 #3978C4 #4039C4

triadic

#3978C4 #C43978 #78C439

tetradic

#3978C4 #C439BE #C48539 #39C440

square

#3978C4 #C439BE #C48539 #39C440

split-complementary

#3978C4 #C44039 #BEC439

monochromatic

#1D3E65 #2B5B95 #3978C4 #6798D3 #97B8E1

Accessibility & contrast

On white

4.51

#3978C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#3978C4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3978C4

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978C4	#FFFFFF	#000000	##000000
##3978C4	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#557EC7

Deuteranopia (green-blind)

#4071C2

Tritanopia (blue-blind)

#008A94

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3978c4;
/* rgb */ color: rgb(57, 120, 196);
/* oklch */ color: oklch(56.9% 0.135 254.7);

Tailwind

colors: {
  custom: {
    50: '#809ed6',
    500: '#3978c4',
    950: '#000000',
  },
}

SCSS

$custom: #3978c4;
$custom-light: #809ed6;
$custom-dark: #000000;

JSON

{
  "hex": "#3978c4",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 196
  },
  "hsl": {
    "h": 212.806,
    "s": 54.941,
    "l": 49.608
  },
  "oklch": {
    "l": 0.56865,
    "c": 0.13455,
    "h": 254.7
  },
  "luminance": 0.18288
}

Semantic roles & 50–950 ramp

primary

#3978C4

secondary

#CCAF8D

accent

#9B4ADE

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0E14

muted

#7C7E83

Preview Lab

Preview with #3978C4

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

Preview Lab → · Contrast checker → · Palette generator →