#399BBB#399BBB

#399BBB is a light, moderate cyan. Relative luminance 0.279; OKLCH L 64.6% C 0.101 H 223.5°. Best body text is #000000 at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#399BBB
RGB	rgb(57, 155, 187)
HSL	hsl(195, 53%, 48%)
HSV	hsv(195, 70%, 73%)
CMYK	cmyk(69.5%, 17.1%, 0%, 26.7%)
CIE-LAB	lab(59.80, -17.98, -24.85)
CIE-LCH	lch(59.80, 30.67, 234.11°)
OKLab	oklab(64.61% -0.0732 -0.0695)
OKLCH	oklch(64.61% 0.101 223.5)
XYZ	xyz(22.3747, 27.8979, 51.2097)
Luminance	0.2790 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#399BBB #BB5939

analogous

#39BB9A #399BBB #395ABB

triadic

#399BBB #BB399B #9BBB39

tetradic

#399BBB #9A39BB #BB5939 #5ABB39

square

#399BBB #9A39BB #BB5939 #5ABB39

split-complementary

#399BBB #BB395A #BB9A39

monochromatic

#1C4D5D #2B748C #399BBB #62B4CF #91CBDD

Accessibility & contrast

On white

3.19

#399BBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.58

#399BBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #399BBB

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##399BBB	#FFFFFF	#000000	##000000
##399BBB	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)

#8997BD

Deuteranopia (green-blind)

#778ABB

Tritanopia (blue-blind)

#00A5A5

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #399bbb;
/* rgb */ color: rgb(57, 155, 187);
/* oklch */ color: oklch(64.6% 0.101 223.5);

Tailwind

colors: {
  custom: {
    50: '#80b8cf',
    500: '#399bbb',
    950: '#000000',
  },
}

SCSS

$custom: #399bbb;
$custom-light: #80b8cf;
$custom-dark: #000000;

JSON

{
  "hex": "#399bbb",
  "rgb": {
    "r": 57,
    "g": 155,
    "b": 187
  },
  "hsl": {
    "h": 194.769,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.64605,
    "c": 0.10089,
    "h": 223.5
  },
  "luminance": 0.279
}

Semantic roles & 50–950 ramp

primary

#399BBB

secondary

#C89787

accent

#6F4BDD

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #399BBB

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

Preview Lab → · Contrast checker → · Palette generator →