#337BDB#337BDB

#337BDB is a mid, vivid cyan. Relative luminance 0.200; OKLCH L 58.8% C 0.163 H 256.9°. Best body text is #000000 at 5.00:1 contrast (WCAG AA passes).

Color values

HEX	#337BDB
RGB	rgb(51, 123, 219)
HSL	hsl(214, 70%, 53%)
HSV	hsv(214, 77%, 86%)
CMYK	cmyk(76.7%, 43.8%, 0%, 14.1%)
CIE-LAB	lab(51.82, 11.06, -55.48)
CIE-LCH	lch(51.82, 56.57, 281.27°)
OKLab	oklab(58.77% -0.0371 -0.159)
OKLCH	oklch(58.77% 0.163 256.9)
XYZ	xyz(21.2297, 19.9817, 69.7421)
Luminance	0.1998 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BDB #DB9333

analogous

#33CFDB #337BDB #3F33DB

triadic

#337BDB #DB337B #7BDB33

tetradic

#337BDB #DB33CF #DB9333 #33DB3F

square

#337BDB #DB33CF #DB9333 #33DB3F

split-complementary

#337BDB #DB3F33 #CFDB33

monochromatic

#16427D #1F5EB1 #337BDB #679DE4 #9BBEED

Accessibility & contrast

On white

4.20

#337BDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.00

#337BDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BDB

5.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BDB	#FFFFFF	#000000	##000000
##337BDB	1.00	4.20	5.00	5.00
#FFFFFF	4.20	1.00	21.00	21.00
#000000	5.00	21.00	1.00	1.00
##000000	5.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A84DF

Deuteranopia (green-blind)

#2874D9

Tritanopia (blue-blind)

#0092A0

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #337bdb;
/* rgb */ color: rgb(51, 123, 219);
/* oklch */ color: oklch(58.8% 0.163 256.9);

Tailwind

colors: {
  custom: {
    50: '#82a0e7',
    500: '#337bdb',
    950: '#000000',
  },
}

SCSS

$custom: #337bdb;
$custom-light: #82a0e7;
$custom-dark: #000000;

JSON

{
  "hex": "#337bdb",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 219
  },
  "hsl": {
    "h": 214.286,
    "s": 70,
    "l": 52.941
  },
  "oklch": {
    "l": 0.5877,
    "c": 0.16324,
    "h": 256.9
  },
  "luminance": 0.19984
}

Semantic roles & 50–950 ramp

primary

#337BDB

secondary

#D9BA91

accent

#A13BED

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #337BDB

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

Preview Lab → · Contrast checker → · Palette generator →