#337CB4#337CB4

#337CB4 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.7% C 0.113 H 245.0°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#337CB4
RGB	rgb(51, 124, 180)
HSL	hsl(206, 56%, 45%)
HSV	hsv(206, 72%, 71%)
CMYK	cmyk(71.7%, 31.1%, 0%, 29.4%)
CIE-LAB	lab(49.99, -3.80, -36.12)
CIE-LCH	lch(49.99, 36.31, 263.99°)
OKLab	oklab(56.66% -0.0476 -0.1022)
OKLCH	oklch(56.66% 0.113 245)
XYZ	xyz(16.8080, 18.4125, 45.8393)
Luminance	0.1841 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337CB4 #B46B33

analogous

#33B4AC #337CB4 #333BB4

triadic

#337CB4 #B4337C #7CB433

tetradic

#337CB4 #AC33B4 #B46B33 #3BB433

square

#337CB4 #AC33B4 #B46B33 #3BB433

split-complementary

#337CB4 #B4333B #B4AC33

monochromatic

#183A55 #255B84 #337CB4 #559ACF #85B6DC

Accessibility & contrast

On white

4.48

#337CB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#337CB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337CB4

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337CB4	#FFFFFF	#000000	##000000
##337CB4	1.00	4.48	4.68	4.68
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637EB6

Deuteranopia (green-blind)

#5171B3

Tritanopia (blue-blind)

#008A90

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337cb4;
/* rgb */ color: rgb(51, 124, 180);
/* oklch */ color: oklch(56.7% 0.113 245.0);

Tailwind

colors: {
  custom: {
    50: '#7ba1ca',
    500: '#337cb4',
    950: '#000000',
  },
}

SCSS

$custom: #337cb4;
$custom-light: #7ba1ca;
$custom-dark: #000000;

JSON

{
  "hex": "#337cb4",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 180
  },
  "hsl": {
    "h": 206.047,
    "s": 55.844,
    "l": 45.294
  },
  "oklch": {
    "l": 0.56657,
    "c": 0.11278,
    "h": 245
  },
  "luminance": 0.18414
}

Semantic roles & 50–950 ramp

primary

#337CB4

secondary

#C69D7D

accent

#8A49DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #337CB4

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

Preview Lab → · Contrast checker → · Palette generator →