#399BB4#399BB4

#399BB4 is a light, moderate cyan. Relative luminance 0.276; OKLCH L 64.3% C 0.096 H 218.0°. Best body text is #000000 at 6.52:1 contrast (WCAG AA passes).

Color values

HEX	#399BB4
RGB	rgb(57, 155, 180)
HSL	hsl(192, 52%, 46%)
HSV	hsv(192, 68%, 71%)
CMYK	cmyk(68.3%, 13.9%, 0%, 29.4%)
CIE-LAB	lab(59.53, -20.23, -21.31)
CIE-LCH	lch(59.53, 29.39, 226.48°)
OKLab	oklab(64.3% -0.0759 -0.0594)
OKLCH	oklch(64.3% 0.096 218)
XYZ	xyz(21.6435, 27.6054, 47.3589)
Luminance	0.2761 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#399BB4 #B45239

analogous

#39B490 #399BB4 #395EB4

triadic

#399BB4 #B4399B #9BB439

tetradic

#399BB4 #9039B4 #B45239 #5EB439

square

#399BB4 #9039B4 #B45239 #5EB439

split-complementary

#399BB4 #B4395E #B49039

monochromatic

#1C4B57 #2A7386 #399BB4 #5EB6CC #8DCBDB

Accessibility & contrast

On white

3.22

#399BB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.52

#399BB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #399BB4

6.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##399BB4	#FFFFFF	#000000	##000000
##399BB4	1.00	3.22	6.52	6.52
#FFFFFF	3.22	1.00	21.00	21.00
#000000	6.52	21.00	1.00	1.00
##000000	6.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8B97B5

Deuteranopia (green-blind)

#7A8AB4

Tritanopia (blue-blind)

#00A4A3

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #399bb4;
/* rgb */ color: rgb(57, 155, 180);
/* oklch */ color: oklch(64.3% 0.096 218.0);

Tailwind

colors: {
  custom: {
    50: '#7fb8ca',
    500: '#399bb4',
    950: '#000000',
  },
}

SCSS

$custom: #399bb4;
$custom-light: #7fb8ca;
$custom-dark: #000000;

JSON

{
  "hex": "#399bb4",
  "rgb": {
    "r": 57,
    "g": 155,
    "b": 180
  },
  "hsl": {
    "h": 192.195,
    "s": 51.899,
    "l": 46.471
  },
  "oklch": {
    "l": 0.64304,
    "c": 0.09638,
    "h": 218
  },
  "luminance": 0.27608
}

Semantic roles & 50–950 ramp

primary

#399BB4

secondary

#C59183

accent

#694CDB

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #399BB4

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

Preview Lab → · Contrast checker → · Palette generator →