#337D9B#337D9B

#337D9B is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.6% C 0.086 H 228.1°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#337D9B
RGB	rgb(51, 125, 155)
HSL	hsl(197, 50%, 40%)
HSV	hsv(197, 67%, 61%)
CMYK	cmyk(67.1%, 19.4%, 0%, 39.2%)
CIE-LAB	lab(49.17, -13.07, -22.86)
CIE-LCH	lch(49.17, 26.33, 240.25°)
OKLab	oklab(55.64% -0.0573 -0.0639)
OKLCH	oklch(55.64% 0.086 228.1)
XYZ	xyz(14.6129, 17.7360, 33.6573)
Luminance	0.1774 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337D9B #9B5133

analogous

#339B85 #337D9B #33499B

triadic

#337D9B #9B337D #7D9B33

tetradic

#337D9B #85339B #9B5133 #499B33

square

#337D9B #85339B #9B5133 #499B33

split-complementary

#337D9B #9B3349 #9B8533

monochromatic

#15333F #24586D #337D9B #48A0C3 #76B8D2

Accessibility & contrast

On white

4.62

#337D9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#337D9B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #337D9B

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337D9B	#FFFFFF	#000000	##FFFFFF
##337D9B	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D7B9D

Deuteranopia (green-blind)

#5F709B

Tritanopia (blue-blind)

#008687

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #337d9b;
/* rgb */ color: rgb(51, 125, 155);
/* oklch */ color: oklch(55.6% 0.086 228.1);

Tailwind

colors: {
  custom: {
    50: '#77a2b8',
    500: '#337d9b',
    950: '#000000',
  },
}

SCSS

$custom: #337d9b;
$custom-light: #77a2b8;
$custom-dark: #000000;

JSON

{
  "hex": "#337d9b",
  "rgb": {
    "r": 51,
    "g": 125,
    "b": 155
  },
  "hsl": {
    "h": 197.308,
    "s": 50.485,
    "l": 40.392
  },
  "oklch": {
    "l": 0.55638,
    "c": 0.08586,
    "h": 228.1
  },
  "luminance": 0.17738
}

Semantic roles & 50–950 ramp

primary

#337D9B

secondary

#BA856F

accent

#764EDA

background

#F7FAFB

surface

#EEF3F6

border

#C9CDD0

text

#0A0F11

muted

#7C7F80

Preview Lab

Preview with #337D9B

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

Preview Lab → · Contrast checker → · Palette generator →