#337BB2#337BB2

#337BB2 is a mid, moderate cyan. Relative luminance 0.181; OKLCH L 56.3% C 0.111 H 244.9°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#337BB2
RGB	rgb(51, 123, 178)
HSL	hsl(206, 55%, 45%)
HSV	hsv(206, 71%, 70%)
CMYK	cmyk(71.3%, 30.9%, 0%, 30.2%)
CIE-LAB	lab(49.60, -3.92, -35.58)
CIE-LCH	lch(49.60, 35.80, 263.71°)
OKLab	oklab(56.31% -0.0472 -0.1007)
OKLCH	oklch(56.31% 0.111 244.9)
XYZ	xyz(16.4810, 18.0823, 44.7325)
Luminance	0.1808 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BB2 #B26A33

analogous

#33B2AA #337BB2 #333CB2

triadic

#337BB2 #B2337B #7BB233

tetradic

#337BB2 #AA33B2 #B26A33 #3CB233

square

#337BB2 #AA33B2 #B26A33 #3CB233

split-complementary

#337BB2 #B2333C #B2AA33

monochromatic

#183953 #255A82 #337BB2 #5499CE #84B6DC

Accessibility & contrast

On white

4.55

#337BB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#337BB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BB2

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BB2	#FFFFFF	#000000	##000000
##337BB2	1.00	4.55	4.62	4.62
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#627DB4

Deuteranopia (green-blind)

#5071B1

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337bb2;
/* rgb */ color: rgb(51, 123, 178);
/* oklch */ color: oklch(56.3% 0.111 244.9);

Tailwind

colors: {
  custom: {
    50: '#7aa0c9',
    500: '#337bb2',
    950: '#000000',
  },
}

SCSS

$custom: #337bb2;
$custom-light: #7aa0c9;
$custom-dark: #000000;

JSON

{
  "hex": "#337bb2",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 178
  },
  "hsl": {
    "h": 205.984,
    "s": 55.459,
    "l": 44.902
  },
  "oklch": {
    "l": 0.56312,
    "c": 0.11123,
    "h": 244.9
  },
  "luminance": 0.18084
}

Semantic roles & 50–950 ramp

primary

#337BB2

secondary

#C59B7C

accent

#8A49DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #337BB2

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

Preview Lab → · Contrast checker → · Palette generator →