#3978C9#3978C9

#3978C9 is a mid, vivid cyan. Relative luminance 0.185; OKLCH L 57.2% C 0.141 H 255.9°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3978C9
RGB	rgb(57, 120, 201)
HSL	hsl(214, 57%, 51%)
HSV	hsv(214, 72%, 79%)
CMYK	cmyk(71.6%, 40.3%, 0%, 21.2%)
CIE-LAB	lab(50.12, 7.07, -47.96)
CIE-LCH	lch(50.12, 48.48, 278.38°)
OKLab	oklab(57.17% -0.0344 -0.1369)
OKLCH	oklch(57.17% 0.141 255.9)
XYZ	xyz(18.9426, 18.5178, 57.8230)
Luminance	0.1852 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978C9 #C98A39

analogous

#39C0C9 #3978C9 #4239C9

triadic

#3978C9 #C93978 #78C939

tetradic

#3978C9 #C939C0 #C98A39 #39C942

square

#3978C9 #C939C0 #C98A39 #39C942

split-complementary

#3978C9 #C94239 #C0C939

monochromatic

#1D3F6B #2A5B9B #3978C9 #6999D6 #99BAE3

Accessibility & contrast

On white

4.46

#3978C9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#3978C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3978C9

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978C9	#FFFFFF	#000000	##000000
##3978C9	1.00	4.46	4.70	4.70
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#527ECC

Deuteranopia (green-blind)

#3B71C7

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3978c9;
/* rgb */ color: rgb(57, 120, 201);
/* oklch */ color: oklch(57.2% 0.141 255.9);

Tailwind

colors: {
  custom: {
    50: '#819eda',
    500: '#3978c9',
    950: '#000000',
  },
}

SCSS

$custom: #3978c9;
$custom-light: #819eda;
$custom-dark: #000000;

JSON

{
  "hex": "#3978c9",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 201
  },
  "hsl": {
    "h": 213.75,
    "s": 57.143,
    "l": 50.588
  },
  "oklch": {
    "l": 0.5717,
    "c": 0.14112,
    "h": 255.9
  },
  "luminance": 0.1852
}

Semantic roles & 50–950 ramp

primary

#3978C9

secondary

#CFB38F

accent

#9D47E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3978C9

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

Preview Lab → · Contrast checker → · Palette generator →