#337C9B#337C9B

#337C9B is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.4% C 0.086 H 229.3°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#337C9B
RGB	rgb(51, 124, 155)
HSL	hsl(198, 50%, 40%)
HSV	hsv(198, 67%, 61%)
CMYK	cmyk(67.1%, 20%, 0%, 39.2%)
CIE-LAB	lab(48.86, -12.50, -23.34)
CIE-LCH	lch(48.86, 26.48, 241.82°)
OKLab	oklab(55.39% -0.0562 -0.0653)
OKLCH	oklch(55.39% 0.086 229.3)
XYZ	xyz(14.4869, 17.4841, 33.6153)
Luminance	0.1749 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337C9B #9B5233

analogous

#339B86 #337C9B #33489B

triadic

#337C9B #9B337C #7C9B33

tetradic

#337C9B #86339B #9B5233 #489B33

square

#337C9B #86339B #9B5233 #489B33

split-complementary

#337C9B #9B3348 #9B8633

monochromatic

#15323F #24576D #337C9B #489EC3 #76B7D2

Accessibility & contrast

On white

4.67

#337C9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#337C9B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #337C9B

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337C9B	#FFFFFF	#000000	##FFFFFF
##337C9B	1.00	4.67	4.50	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C7A9D

Deuteranopia (green-blind)

#5E6F9B

Tritanopia (blue-blind)

#008586

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #337c9b;
/* rgb */ color: rgb(51, 124, 155);
/* oklch */ color: oklch(55.4% 0.086 229.3);

Tailwind

colors: {
  custom: {
    50: '#77a2b8',
    500: '#337c9b',
    950: '#000000',
  },
}

SCSS

$custom: #337c9b;
$custom-light: #77a2b8;
$custom-dark: #000000;

JSON

{
  "hex": "#337c9b",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 155
  },
  "hsl": {
    "h": 197.885,
    "s": 50.485,
    "l": 40.392
  },
  "oklch": {
    "l": 0.55391,
    "c": 0.08618,
    "h": 229.3
  },
  "luminance": 0.17486
}

Semantic roles & 50–950 ramp

primary

#337C9B

secondary

#BA866F

accent

#784EDA

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0F11

muted

#7C7E80

Preview Lab

Preview with #337C9B

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

Preview Lab → · Contrast checker → · Palette generator →