#337CB5#337CB5

#337CB5 is a mid, moderate cyan. Relative luminance 0.185; OKLCH L 56.7% C 0.114 H 245.5°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#337CB5
RGB	rgb(51, 124, 181)
HSL	hsl(206, 56%, 45%)
HSV	hsv(206, 72%, 71%)
CMYK	cmyk(71.8%, 31.5%, 0%, 29%)
CIE-LAB	lab(50.04, -3.45, -36.62)
CIE-LCH	lch(50.04, 36.78, 264.62°)
OKLab	oklab(56.71% -0.0473 -0.1037)
OKLCH	oklch(56.71% 0.114 245.5)
XYZ	xyz(16.9102, 18.4534, 46.3778)
Luminance	0.1845 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337CB5 #B56C33

analogous

#33B5AD #337CB5 #333BB5

triadic

#337CB5 #B5337C #7CB533

tetradic

#337CB5 #AD33B5 #B56C33 #3BB533

square

#337CB5 #AD33B5 #B56C33 #3BB533

split-complementary

#337CB5 #B5333B #B5AD33

monochromatic

#183B56 #265B85 #337CB5 #569ACF #86B7DD

Accessibility & contrast

On white

4.48

#337CB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#337CB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337CB5

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337CB5	#FFFFFF	#000000	##000000
##337CB5	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#627EB7

Deuteranopia (green-blind)

#5072B4

Tritanopia (blue-blind)

#008A90

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337cb5;
/* rgb */ color: rgb(51, 124, 181);
/* oklch */ color: oklch(56.7% 0.114 245.5);

Tailwind

colors: {
  custom: {
    50: '#7ba1cb',
    500: '#337cb5',
    950: '#000000',
  },
}

SCSS

$custom: #337cb5;
$custom-light: #7ba1cb;
$custom-dark: #000000;

JSON

{
  "hex": "#337cb5",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 181
  },
  "hsl": {
    "h": 206.308,
    "s": 56.034,
    "l": 45.49
  },
  "oklch": {
    "l": 0.56712,
    "c": 0.11398,
    "h": 245.5
  },
  "luminance": 0.18455
}

Semantic roles & 50–950 ramp

primary

#337CB5

secondary

#C69D7D

accent

#8B48DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #337CB5

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

Preview Lab → · Contrast checker → · Palette generator →