#337FDA#337FDA

#337FDA is a mid, vivid cyan. Relative luminance 0.209; OKLCH L 59.6% C 0.158 H 255.1°. Best body text is #000000 at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#337FDA
RGB	rgb(51, 127, 218)
HSL	hsl(213, 69%, 53%)
HSV	hsv(213, 77%, 85%)
CMYK	cmyk(76.6%, 41.7%, 0%, 14.5%)
CIE-LAB	lab(52.89, 8.22, -53.20)
CIE-LCH	lch(52.89, 53.83, 278.79°)
OKLab	oklab(59.58% -0.0406 -0.1522)
OKLCH	oklch(59.58% 0.158 255.1)
XYZ	xyz(21.6048, 20.9420, 69.2196)
Luminance	0.2094 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FDA #DA8E33

analogous

#33D2DA #337FDA #3B33DA

triadic

#337FDA #DA337F #7FDA33

tetradic

#337FDA #DA33D2 #DA8E33 #33DA3B

square

#337FDA #DA33D2 #DA8E33 #33DA3B

split-complementary

#337FDA #DA3B33 #D2DA33

monochromatic

#17457C #2061B0 #337FDA #67A0E3 #9BC0ED

Accessibility & contrast

On white

4.05

#337FDA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.19

#337FDA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FDA

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FDA	#FFFFFF	#000000	##000000
##337FDA	1.00	4.05	5.19	5.19
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.19	21.00	1.00	1.00
##000000	5.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5286DE

Deuteranopia (green-blind)

#3577D8

Tritanopia (blue-blind)

#0095A2

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #337fda;
/* rgb */ color: rgb(51, 127, 218);
/* oklch */ color: oklch(59.6% 0.158 255.1);

Tailwind

colors: {
  custom: {
    50: '#82a3e6',
    500: '#337fda',
    950: '#000000',
  },
}

SCSS

$custom: #337fda;
$custom-light: #82a3e6;
$custom-dark: #000000;

JSON

{
  "hex": "#337fda",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 218
  },
  "hsl": {
    "h": 212.695,
    "s": 69.295,
    "l": 52.745
  },
  "oklch": {
    "l": 0.59581,
    "c": 0.15754,
    "h": 255.1
  },
  "luminance": 0.20945
}

Semantic roles & 50–950 ramp

primary

#337FDA

secondary

#D9B890

accent

#9C3CEC

background

#F8FAFE

surface

#F0F3FC

border

#CBCDD5

text

#0C0F16

muted

#7D7F84

Preview Lab

Preview with #337FDA

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

Preview Lab → · Contrast checker → · Palette generator →