#3981CC#3981CC

#3981CC is a mid, vivid cyan. Relative luminance 0.209; OKLCH L 59.4% C 0.136 H 251.9°. Best body text is #000000 at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#3981CC
RGB	rgb(57, 129, 204)
HSL	hsl(211, 59%, 51%)
HSV	hsv(211, 72%, 80%)
CMYK	cmyk(72.1%, 36.8%, 0%, 20%)
CIE-LAB	lab(52.87, 2.67, -45.30)
CIE-LCH	lch(52.87, 45.38, 273.37°)
OKLab	oklab(59.37% -0.042 -0.1289)
OKLCH	oklch(59.37% 0.136 251.9)
XYZ	xyz(20.4326, 20.9277, 60.0776)
Luminance	0.2093 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3981CC #CC8439

analogous

#39CACC #3981CC #3A39CC

triadic

#3981CC #CC3981 #81CC39

tetradic

#3981CC #CC39CA #CC8439 #39CC3A

square

#3981CC #CC39CA #CC8439 #39CC3A

split-complementary

#3981CC #CC3A39 #CACC39

monochromatic

#1C446E #29639F #3981CC #6AA0D9 #9ABFE5

Accessibility & contrast

On white

4.05

#3981CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.19

#3981CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3981CC

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3981CC	#FFFFFF	#000000	##000000
##3981CC	1.00	4.05	5.19	5.19
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.19	21.00	1.00	1.00
##000000	5.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F86CF

Deuteranopia (green-blind)

#4978CB

Tritanopia (blue-blind)

#00939D

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3981cc;
/* rgb */ color: rgb(57, 129, 204);
/* oklch */ color: oklch(59.4% 0.136 251.9);

Tailwind

colors: {
  custom: {
    50: '#81a5dc',
    500: '#3981cc',
    950: '#000000',
  },
}

SCSS

$custom: #3981cc;
$custom-light: #81a5dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3981cc",
  "rgb": {
    "r": 57,
    "g": 129,
    "b": 204
  },
  "hsl": {
    "h": 210.612,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.5937,
    "c": 0.13559,
    "h": 251.9
  },
  "luminance": 0.2093
}

Semantic roles & 50–950 ramp

primary

#3981CC

secondary

#D1B190

accent

#9546E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3981CC

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

Preview Lab → · Contrast checker → · Palette generator →