#3978C7#3978C7

#3978C7 is a mid, vivid cyan. Relative luminance 0.184; OKLCH L 57.0% C 0.138 H 255.4°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3978C7
RGB	rgb(57, 120, 199)
HSL	hsl(213, 56%, 50%)
HSV	hsv(213, 71%, 78%)
CMYK	cmyk(71.4%, 39.7%, 0%, 22%)
CIE-LAB	lab(50.01, 6.34, -47.00)
CIE-LCH	lch(50.01, 47.42, 277.68°)
OKLab	oklab(57.05% -0.0348 -0.134)
OKLCH	oklch(57.05% 0.138 255.4)
XYZ	xyz(18.7088, 18.4243, 56.5920)
Luminance	0.1843 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978C7 #C78839

analogous

#39BFC7 #3978C7 #4139C7

triadic

#3978C7 #C73978 #78C739

tetradic

#3978C7 #C739BF #C78839 #39C741

square

#3978C7 #C739BF #C78839 #39C741

split-complementary

#3978C7 #C74139 #BFC739

monochromatic

#1D3F68 #2B5B98 #3978C7 #6999D4 #98B9E2

Accessibility & contrast

On white

4.48

#3978C7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#3978C7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3978C7

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978C7	#FFFFFF	#000000	##000000
##3978C7	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#537ECA

Deuteranopia (green-blind)

#3D71C5

Tritanopia (blue-blind)

#008A96

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3978c7;
/* rgb */ color: rgb(57, 120, 199);
/* oklch */ color: oklch(57.0% 0.138 255.4);

Tailwind

colors: {
  custom: {
    50: '#809ed8',
    500: '#3978c7',
    950: '#000000',
  },
}

SCSS

$custom: #3978c7;
$custom-light: #809ed8;
$custom-dark: #000000;

JSON

{
  "hex": "#3978c7",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 199
  },
  "hsl": {
    "h": 213.38,
    "s": 55.906,
    "l": 50.196
  },
  "oklch": {
    "l": 0.57047,
    "c": 0.13849,
    "h": 255.4
  },
  "luminance": 0.18426
}

Semantic roles & 50–950 ramp

primary

#3978C7

secondary

#CEB18E

accent

#9C49DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3978C7

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

Preview Lab → · Contrast checker → · Palette generator →