#337F9B#337F9B

#337F9B is a mid, moderate cyan. Relative luminance 0.182; OKLCH L 56.1% C 0.085 H 225.8°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#337F9B
RGB	rgb(51, 127, 155)
HSL	hsl(196, 50%, 40%)
HSV	hsv(196, 67%, 61%)
CMYK	cmyk(67.1%, 18.1%, 0%, 39.2%)
CIE-LAB	lab(49.79, -14.19, -21.90)
CIE-LCH	lch(49.79, 26.10, 237.07°)
OKLab	oklab(56.13% -0.0595 -0.0612)
OKLCH	oklch(56.13% 0.085 225.8)
XYZ	xyz(14.8686, 18.2475, 33.7425)
Luminance	0.1825 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337F9B #9B4F33

analogous

#339B83 #337F9B #334B9B

triadic

#337F9B #9B337F #7F9B33

tetradic

#337F9B #83339B #9B4F33 #4B9B33

square

#337F9B #83339B #9B4F33 #4B9B33

split-complementary

#337F9B #9B334B #9B8333

monochromatic

#15343F #24596D #337F9B #48A2C3 #76B9D2

Accessibility & contrast

On white

4.52

#337F9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#337F9B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337F9B

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337F9B	#FFFFFF	#000000	##000000
##337F9B	1.00	4.52	4.65	4.65
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#707C9C

Deuteranopia (green-blind)

#61729B

Tritanopia (blue-blind)

#008788

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337f9b;
/* rgb */ color: rgb(51, 127, 155);
/* oklch */ color: oklch(56.1% 0.085 225.8);

Tailwind

colors: {
  custom: {
    50: '#77a4b8',
    500: '#337f9b',
    950: '#000000',
  },
}

SCSS

$custom: #337f9b;
$custom-light: #77a4b8;
$custom-dark: #000000;

JSON

{
  "hex": "#337f9b",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 155
  },
  "hsl": {
    "h": 196.154,
    "s": 50.485,
    "l": 40.392
  },
  "oklch": {
    "l": 0.56134,
    "c": 0.08534,
    "h": 225.8
  },
  "luminance": 0.18249
}

Semantic roles & 50–950 ramp

primary

#337F9B

secondary

#BA846F

accent

#744EDA

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A0F11

muted

#7C7F80

Preview Lab

Preview with #337F9B

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

Preview Lab → · Contrast checker → · Palette generator →