#399BB5#399BB5

#399BB5 is a light, moderate cyan. Relative luminance 0.276; OKLCH L 64.3% C 0.097 H 218.8°. Best body text is #000000 at 6.53:1 contrast (WCAG AA passes).

Color values

HEX	#399BB5
RGB	rgb(57, 155, 181)
HSL	hsl(193, 52%, 47%)
HSV	hsv(193, 69%, 71%)
CMYK	cmyk(68.5%, 14.4%, 0%, 29%)
CIE-LAB	lab(59.57, -19.92, -21.82)
CIE-LCH	lch(59.57, 29.54, 227.61°)
OKLab	oklab(64.35% -0.0755 -0.0608)
OKLCH	oklch(64.35% 0.097 218.8)
XYZ	xyz(21.7457, 27.6463, 47.8973)
Luminance	0.2765 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#399BB5 #B55339

analogous

#39B591 #399BB5 #395DB5

triadic

#399BB5 #B5399B #9BB539

tetradic

#399BB5 #9139B5 #B55339 #5DB539

square

#399BB5 #9139B5 #B55339 #5DB539

split-complementary

#399BB5 #B5395D #B59139

monochromatic

#1C4B58 #2A7386 #399BB5 #5FB5CD #8DCBDB

Accessibility & contrast

On white

3.22

#399BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.53

#399BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #399BB5

6.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##399BB5	#FFFFFF	#000000	##000000
##399BB5	1.00	3.22	6.53	6.53
#FFFFFF	3.22	1.00	21.00	21.00
#000000	6.53	21.00	1.00	1.00
##000000	6.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8B97B6

Deuteranopia (green-blind)

#798AB5

Tritanopia (blue-blind)

#00A4A3

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #399bb5;
/* rgb */ color: rgb(57, 155, 181);
/* oklch */ color: oklch(64.3% 0.097 218.8);

Tailwind

colors: {
  custom: {
    50: '#7fb8cb',
    500: '#399bb5',
    950: '#000000',
  },
}

SCSS

$custom: #399bb5;
$custom-light: #7fb8cb;
$custom-dark: #000000;

JSON

{
  "hex": "#399bb5",
  "rgb": {
    "r": 57,
    "g": 155,
    "b": 181
  },
  "hsl": {
    "h": 192.581,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.64346,
    "c": 0.09696,
    "h": 218.8
  },
  "luminance": 0.27649
}

Semantic roles & 50–950 ramp

primary

#399BB5

secondary

#C69284

accent

#6A4CDC

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #399BB5

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

Preview Lab → · Contrast checker → · Palette generator →