#337AA5#337AA5

#337AA5 is a mid, moderate cyan. Relative luminance 0.173; OKLCH L 55.4% C 0.097 H 238.7°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#337AA5
RGB	rgb(51, 122, 165)
HSL	hsl(203, 53%, 42%)
HSV	hsv(203, 69%, 65%)
CMYK	cmyk(69.1%, 26.1%, 0%, 35.3%)
CIE-LAB	lab(48.68, -7.92, -29.46)
CIE-LCH	lch(48.68, 30.51, 254.95°)
OKLab	oklab(55.39% -0.0505 -0.0829)
OKLCH	oklch(55.39% 0.097 238.7)
XYZ	xyz(15.1137, 17.3379, 38.1400)
Luminance	0.1734 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337AA5 #A55E33

analogous

#33A597 #337AA5 #3341A5

triadic

#337AA5 #A5337A #7AA533

tetradic

#337AA5 #9733A5 #A55E33 #41A533

square

#337AA5 #9733A5 #A55E33 #41A533

split-complementary

#337AA5 #A53341 #A59733

monochromatic

#163548 #255776 #337AA5 #4D9AC8 #7CB4D6

Accessibility & contrast

On white

4.70

#337AA5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#337AA5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #337AA5

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337AA5	#FFFFFF	#000000	##FFFFFF
##337AA5	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#667AA7

Deuteranopia (green-blind)

#566FA4

Tritanopia (blue-blind)

#008589

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #337aa5;
/* rgb */ color: rgb(51, 122, 165);
/* oklch */ color: oklch(55.4% 0.097 238.7);

Tailwind

colors: {
  custom: {
    50: '#78a0c0',
    500: '#337aa5',
    950: '#000000',
  },
}

SCSS

$custom: #337aa5;
$custom-light: #78a0c0;
$custom-dark: #000000;

JSON

{
  "hex": "#337aa5",
  "rgb": {
    "r": 51,
    "g": 122,
    "b": 165
  },
  "hsl": {
    "h": 202.632,
    "s": 52.778,
    "l": 42.353
  },
  "oklch": {
    "l": 0.55389,
    "c": 0.09709,
    "h": 238.7
  },
  "luminance": 0.17339
}

Semantic roles & 50–950 ramp

primary

#337AA5

secondary

#BF9175

accent

#824CDC

background

#F7F9FB

surface

#EEF2F7

border

#C9CCD0

text

#0A0E12

muted

#7C7E81

Preview Lab

Preview with #337AA5

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

Preview Lab → · Contrast checker → · Palette generator →