#3979B3#3979B3

#3979B3 is a mid, moderate cyan. Relative luminance 0.178; OKLCH L 56.1% C 0.112 H 248.5°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3979B3
RGB	rgb(57, 121, 179)
HSL	hsl(209, 52%, 46%)
HSV	hsv(209, 68%, 70%)
CMYK	cmyk(68.2%, 32.4%, 0%, 29.8%)
CIE-LAB	lab(49.25, -1.43, -36.69)
CIE-LCH	lch(49.25, 36.72, 267.76°)
OKLab	oklab(56.11% -0.041 -0.1039)
OKLCH	oklch(56.11% 0.112 248.5)
XYZ	xyz(16.6584, 17.7975, 45.1964)
Luminance	0.1780 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3979B3 #B37339

analogous

#39B3B0 #3979B3 #393CB3

triadic

#3979B3 #B33979 #79B339

tetradic

#3979B3 #B039B3 #B37339 #3CB339

square

#3979B3 #B039B3 #B37339 #3CB339

split-complementary

#3979B3 #B3393C #B3B039

monochromatic

#1B3A56 #2A5A85 #3979B3 #5E97CC #8CB5DA

Accessibility & contrast

On white

4.61

#3979B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3979B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3979B3

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3979B3	#FFFFFF	#000000	##FFFFFF
##3979B3	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F7BB5

Deuteranopia (green-blind)

#4E70B2

Tritanopia (blue-blind)

#00878E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3979b3;
/* rgb */ color: rgb(57, 121, 179);
/* oklch */ color: oklch(56.1% 0.112 248.5);

Tailwind

colors: {
  custom: {
    50: '#7d9fca',
    500: '#3979b3',
    950: '#000000',
  },
}

SCSS

$custom: #3979b3;
$custom-light: #7d9fca;
$custom-dark: #000000;

JSON

{
  "hex": "#3979b3",
  "rgb": {
    "r": 57,
    "g": 121,
    "b": 179
  },
  "hsl": {
    "h": 208.525,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.56112,
    "c": 0.11168,
    "h": 248.5
  },
  "luminance": 0.17799
}

Semantic roles & 50–950 ramp

primary

#3979B3

secondary

#C5A283

accent

#904DDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3979B3

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

Preview Lab → · Contrast checker → · Palette generator →