#3978CC#3978CC

#3978CC is a mid, vivid cyan. Relative luminance 0.187; OKLCH L 57.4% C 0.145 H 256.6°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#3978CC
RGB	rgb(57, 120, 204)
HSL	hsl(214, 59%, 51%)
HSV	hsv(214, 72%, 80%)
CMYK	cmyk(72.1%, 41.2%, 0%, 20%)
CIE-LAB	lab(50.29, 8.16, -49.41)
CIE-LCH	lch(50.29, 50.07, 279.38°)
OKLab	oklab(57.36% -0.0337 -0.1411)
OKLCH	oklch(57.36% 0.145 256.6)
XYZ	xyz(19.2989, 18.6603, 59.6997)
Luminance	0.1866 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978CC #CC8D39

analogous

#39C1CC #3978CC #4339CC

triadic

#3978CC #CC3978 #78CC39

tetradic

#3978CC #CC39C1 #CC8D39 #39CC43

square

#3978CC #CC39C1 #CC8D39 #39CC43

split-complementary

#3978CC #CC4339 #C1CC39

monochromatic

#1C3F6E #295B9F #3978CC #6A99D9 #9ABAE5

Accessibility & contrast

On white

4.44

#3978CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#3978CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3978CC

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978CC	#FFFFFF	#000000	##000000
##3978CC	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#507FCF

Deuteranopia (green-blind)

#3871CA

Tritanopia (blue-blind)

#008C98

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #3978cc;
/* rgb */ color: rgb(57, 120, 204);
/* oklch */ color: oklch(57.4% 0.145 256.6);

Tailwind

colors: {
  custom: {
    50: '#819edc',
    500: '#3978cc',
    950: '#000000',
  },
}

SCSS

$custom: #3978cc;
$custom-light: #819edc;
$custom-dark: #000000;

JSON

{
  "hex": "#3978cc",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 204
  },
  "hsl": {
    "h": 214.286,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.57356,
    "c": 0.14507,
    "h": 256.6
  },
  "luminance": 0.18662
}

Semantic roles & 50–950 ramp

primary

#3978CC

secondary

#D1B590

accent

#9F46E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3978CC

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

Preview Lab → · Contrast checker → · Palette generator →