#337DBB#337DBB

#337DBB is a mid, vivid cyan. Relative luminance 0.190; OKLCH L 57.3% C 0.120 H 247.3°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#337DBB
RGB	rgb(51, 125, 187)
HSL	hsl(207, 57%, 47%)
HSV	hsv(207, 73%, 73%)
CMYK	cmyk(72.7%, 33.2%, 0%, 26.7%)
CIE-LAB	lab(50.64, -1.89, -39.13)
CIE-LCH	lch(50.64, 39.18, 267.24°)
OKLab	oklab(57.28% -0.0465 -0.111)
OKLCH	oklch(57.28% 0.12 247.3)
XYZ	xyz(17.6651, 18.9569, 49.7321)
Luminance	0.1896 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337DBB #BB7133

analogous

#33BBB5 #337DBB #3339BB

triadic

#337DBB #BB337D #7DBB33

tetradic

#337DBB #B533BB #BB7133 #39BB33

square

#337DBB #B533BB #BB7133 #39BB33

split-complementary

#337DBB #BB3339 #BBB533

monochromatic

#193D5B #265D8B #337DBB #599BD2 #89B8DF

Accessibility & contrast

On white

4.38

#337DBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#337DBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337DBB

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337DBB	#FFFFFF	#000000	##000000
##337DBB	1.00	4.38	4.79	4.79
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6180BE

Deuteranopia (green-blind)

#4E73BA

Tritanopia (blue-blind)

#008C93

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #337dbb;
/* rgb */ color: rgb(51, 125, 187);
/* oklch */ color: oklch(57.3% 0.120 247.3);

Tailwind

colors: {
  custom: {
    50: '#7ca2d0',
    500: '#337dbb',
    950: '#000000',
  },
}

SCSS

$custom: #337dbb;
$custom-light: #7ca2d0;
$custom-dark: #000000;

JSON

{
  "hex": "#337dbb",
  "rgb": {
    "r": 51,
    "g": 125,
    "b": 187
  },
  "hsl": {
    "h": 207.353,
    "s": 57.143,
    "l": 46.667
  },
  "oklch": {
    "l": 0.57278,
    "c": 0.12038,
    "h": 247.3
  },
  "luminance": 0.18959
}

Semantic roles & 50–950 ramp

primary

#337DBB

secondary

#C9A281

accent

#8D47E0

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0F14

muted

#7C7E82

Preview Lab

Preview with #337DBB

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

Preview Lab → · Contrast checker → · Palette generator →