#399CB3#399CB3

#399CB3 is a light, moderate cyan. Relative luminance 0.279; OKLCH L 64.5% C 0.096 H 216.2°. Best body text is #000000 at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#399CB3
RGB	rgb(57, 156, 179)
HSL	hsl(191, 52%, 46%)
HSV	hsv(191, 68%, 70%)
CMYK	cmyk(68.2%, 12.8%, 0%, 29.8%)
CIE-LAB	lab(59.80, -21.08, -20.34)
CIE-LCH	lch(59.80, 29.29, 223.98°)
OKLab	oklab(64.51% -0.0773 -0.0566)
OKLCH	oklch(64.51% 0.096 216.2)
XYZ	xyz(21.7091, 27.8990, 46.8800)
Luminance	0.2790 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#399CB3 #B35039

analogous

#39B38D #399CB3 #395FB3

triadic

#399CB3 #B3399C #9CB339

tetradic

#399CB3 #8D39B3 #B35039 #5FB339

square

#399CB3 #8D39B3 #B35039 #5FB339

split-complementary

#399CB3 #B3395F #B38D39

monochromatic

#1B4B56 #2A7485 #399CB3 #5EB7CC #8CCCDA

Accessibility & contrast

On white

3.19

#399CB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.58

#399CB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #399CB3

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##399CB3	#FFFFFF	#000000	##000000
##399CB3	1.00	3.19	6.58	6.58
#FFFFFF	3.19	1.00	21.00	21.00
#000000	6.58	21.00	1.00	1.00
##000000	6.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8C97B4

Deuteranopia (green-blind)

#7B8BB3

Tritanopia (blue-blind)

#00A4A3

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #399cb3;
/* rgb */ color: rgb(57, 156, 179);
/* oklch */ color: oklch(64.5% 0.096 216.2);

Tailwind

colors: {
  custom: {
    50: '#7fb9c9',
    500: '#399cb3',
    950: '#000000',
  },
}

SCSS

$custom: #399cb3;
$custom-light: #7fb9c9;
$custom-dark: #000000;

JSON

{
  "hex": "#399cb3",
  "rgb": {
    "r": 57,
    "g": 156,
    "b": 179
  },
  "hsl": {
    "h": 191.311,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.64506,
    "c": 0.09586,
    "h": 216.2
  },
  "luminance": 0.27901
}

Semantic roles & 50–950 ramp

primary

#399CB3

secondary

#C58F83

accent

#684DDB

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #399CB3

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

Preview Lab → · Contrast checker → · Palette generator →