#337FA3#337FA3

#337FA3 is a mid, moderate cyan. Relative luminance 0.185; OKLCH L 56.5% C 0.092 H 232.3°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#337FA3
RGB	rgb(51, 127, 163)
HSL	hsl(199, 52%, 42%)
HSV	hsv(199, 69%, 64%)
CMYK	cmyk(68.7%, 22.1%, 0%, 36.1%)
CIE-LAB	lab(50.13, -11.49, -26.05)
CIE-LCH	lch(50.13, 28.47, 246.20°)
OKLab	oklab(56.51% -0.0564 -0.0731)
OKLCH	oklch(56.51% 0.092 232.3)
XYZ	xyz(15.5629, 18.5252, 37.3988)
Luminance	0.1853 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FA3 #A35733

analogous

#33A38F #337FA3 #3347A3

triadic

#337FA3 #A3337F #7FA333

tetradic

#337FA3 #8F33A3 #A35733 #47A333

square

#337FA3 #8F33A3 #A35733 #47A333

split-complementary

#337FA3 #A33347 #A38F33

monochromatic

#163646 #245B74 #337FA3 #4CA0C7 #7BB8D6

Accessibility & contrast

On white

4.46

#337FA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#337FA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FA3

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FA3	#FFFFFF	#000000	##000000
##337FA3	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D7EA5

Deuteranopia (green-blind)

#5E72A2

Tritanopia (blue-blind)

#00898B

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337fa3;
/* rgb */ color: rgb(51, 127, 163);
/* oklch */ color: oklch(56.5% 0.092 232.3);

Tailwind

colors: {
  custom: {
    50: '#78a4be',
    500: '#337fa3',
    950: '#000000',
  },
}

SCSS

$custom: #337fa3;
$custom-light: #78a4be;
$custom-dark: #000000;

JSON

{
  "hex": "#337fa3",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 163
  },
  "hsl": {
    "h": 199.286,
    "s": 52.336,
    "l": 41.961
  },
  "oklch": {
    "l": 0.56509,
    "c": 0.09234,
    "h": 232.3
  },
  "luminance": 0.18527
}

Semantic roles & 50–950 ramp

primary

#337FA3

secondary

#BE8C73

accent

#7A4CDC

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #337FA3

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

Preview Lab → · Contrast checker → · Palette generator →