#337FA1#337FA1

#337FA1 is a mid, moderate cyan. Relative luminance 0.185; OKLCH L 56.4% C 0.090 H 230.8°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#337FA1
RGB	rgb(51, 127, 161)
HSL	hsl(199, 52%, 42%)
HSV	hsv(199, 68%, 63%)
CMYK	cmyk(68.3%, 21.1%, 0%, 36.9%)
CIE-LAB	lab(50.04, -12.17, -25.02)
CIE-LCH	lch(50.04, 27.82, 244.06°)
OKLab	oklab(56.41% -0.0572 -0.0701)
OKLCH	oklch(56.41% 0.09 230.8)
XYZ	xyz(15.3851, 18.4541, 36.4625)
Luminance	0.1846 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FA1 #A15533

analogous

#33A18C #337FA1 #3348A1

triadic

#337FA1 #A1337F #7FA133

tetradic

#337FA1 #8C33A1 #A15533 #48A133

square

#337FA1 #8C33A1 #A15533 #48A133

split-complementary

#337FA1 #A13348 #A18C33

monochromatic

#163644 #245A73 #337FA1 #4BA0C6 #7AB9D5

Accessibility & contrast

On white

4.48

#337FA1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#337FA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FA1

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FA1	#FFFFFF	#000000	##000000
##337FA1	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E7DA3

Deuteranopia (green-blind)

#5F72A1

Tritanopia (blue-blind)

#00888A

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337fa1;
/* rgb */ color: rgb(51, 127, 161);
/* oklch */ color: oklch(56.4% 0.090 230.8);

Tailwind

colors: {
  custom: {
    50: '#78a4bd',
    500: '#337fa1',
    950: '#000000',
  },
}

SCSS

$custom: #337fa1;
$custom-light: #78a4bd;
$custom-dark: #000000;

JSON

{
  "hex": "#337fa1",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 161
  },
  "hsl": {
    "h": 198.545,
    "s": 51.887,
    "l": 41.569
  },
  "oklch": {
    "l": 0.56413,
    "c": 0.09048,
    "h": 230.8
  },
  "luminance": 0.18456
}

Semantic roles & 50–950 ramp

primary

#337FA1

secondary

#BD8A72

accent

#794CDB

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #337FA1

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

Preview Lab → · Contrast checker → · Palette generator →