#337ACC#337ACC

#337ACC is a mid, vivid cyan. Relative luminance 0.190; OKLCH L 57.6% C 0.145 H 254.2°. Best body text is #000000 at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#337ACC
RGB	rgb(51, 122, 204)
HSL	hsl(212, 60%, 50%)
HSV	hsv(212, 75%, 80%)
CMYK	cmyk(75%, 40.2%, 0%, 20%)
CIE-LAB	lab(50.66, 6.13, -48.82)
CIE-LCH	lch(50.66, 49.20, 277.16°)
OKLab	oklab(57.6% -0.0394 -0.1394)
OKLCH	oklch(57.6% 0.145 254.2)
XYZ	xyz(19.2198, 18.9803, 59.7657)
Luminance	0.1898 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337ACC #CC8533

analogous

#33C6CC #337ACC #3933CC

triadic

#337ACC #CC337A #7ACC33

tetradic

#337ACC #CC33C6 #CC8533 #33CC39

square

#337ACC #CC33C6 #CC8533 #33CC39

split-complementary

#337ACC #CC3933 #C6CC33

monochromatic

#1B3F6A #275D9B #337ACC #649AD8 #95BAE4

Accessibility & contrast

On white

4.38

#337ACC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.80

#337ACC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337ACC

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337ACC	#FFFFFF	#000000	##000000
##337ACC	1.00	4.38	4.80	4.80
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.80	21.00	1.00	1.00
##000000	4.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5380CF

Deuteranopia (green-blind)

#3A72CA

Tritanopia (blue-blind)

#008D99

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #337acc;
/* rgb */ color: rgb(51, 122, 204);
/* oklch */ color: oklch(57.6% 0.145 254.2);

Tailwind

colors: {
  custom: {
    50: '#7f9fdc',
    500: '#337acc',
    950: '#000000',
  },
}

SCSS

$custom: #337acc;
$custom-light: #7f9fdc;
$custom-dark: #000000;

JSON

{
  "hex": "#337acc",
  "rgb": {
    "r": 51,
    "g": 122,
    "b": 204
  },
  "hsl": {
    "h": 212.157,
    "s": 60,
    "l": 50
  },
  "oklch": {
    "l": 0.57595,
    "c": 0.14487,
    "h": 254.2
  },
  "luminance": 0.18983
}

Semantic roles & 50–950 ramp

primary

#337ACC

secondary

#D0B08B

accent

#9A45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #337ACC

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

Preview Lab → · Contrast checker → · Palette generator →