#337EA5#337EA5

#337EA5 is a mid, moderate cyan. Relative luminance 0.183; OKLCH L 56.4% C 0.095 H 234.8°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#337EA5
RGB	rgb(51, 126, 165)
HSL	hsl(201, 53%, 42%)
HSV	hsv(201, 69%, 65%)
CMYK	cmyk(69.1%, 23.6%, 0%, 35.3%)
CIE-LAB	lab(49.91, -10.23, -27.56)
CIE-LCH	lch(49.91, 29.40, 249.63°)
OKLab	oklab(56.36% -0.0547 -0.0774)
OKLCH	oklch(56.36% 0.095 234.8)
XYZ	xyz(15.6150, 18.3404, 38.3071)
Luminance	0.1834 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337EA5 #A55A33

analogous

#33A593 #337EA5 #3345A5

triadic

#337EA5 #A5337E #7EA533

tetradic

#337EA5 #9333A5 #A55A33 #45A533

square

#337EA5 #9333A5 #A55A33 #45A533

split-complementary

#337EA5 #A53345 #A59333

monochromatic

#163748 #255A76 #337EA5 #4D9EC8 #7CB8D6

Accessibility & contrast

On white

4.50

#337EA5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#337EA5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337EA5

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337EA5	#FFFFFF	#000000	##000000
##337EA5	1.00	4.50	4.67	4.67
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B7DA7

Deuteranopia (green-blind)

#5C72A4

Tritanopia (blue-blind)

#00888B

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337ea5;
/* rgb */ color: rgb(51, 126, 165);
/* oklch */ color: oklch(56.4% 0.095 234.8);

Tailwind

colors: {
  custom: {
    50: '#78a3c0',
    500: '#337ea5',
    950: '#000000',
  },
}

SCSS

$custom: #337ea5;
$custom-light: #78a3c0;
$custom-dark: #000000;

JSON

{
  "hex": "#337ea5",
  "rgb": {
    "r": 51,
    "g": 126,
    "b": 165
  },
  "hsl": {
    "h": 200.526,
    "s": 52.778,
    "l": 42.353
  },
  "oklch": {
    "l": 0.56361,
    "c": 0.09477,
    "h": 234.8
  },
  "luminance": 0.18342
}

Semantic roles & 50–950 ramp

primary

#337EA5

secondary

#BF8E75

accent

#7D4CDC

background

#F7FAFB

surface

#EEF3F7

border

#C9CDD0

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #337EA5

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

Preview Lab → · Contrast checker → · Palette generator →