#337EB3#337EB3

#337EB3 is a mid, moderate cyan. Relative luminance 0.189; OKLCH L 57.1% C 0.110 H 243.0°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#337EB3
RGB	rgb(51, 126, 179)
HSL	hsl(205, 56%, 45%)
HSV	hsv(205, 72%, 70%)
CMYK	cmyk(71.5%, 29.6%, 0%, 29.8%)
CIE-LAB	lab(50.54, -5.34, -34.67)
CIE-LCH	lch(50.54, 35.08, 261.24°)
OKLab	oklab(57.08% -0.0499 -0.098)
OKLCH	oklch(57.08% 0.11 243)
XYZ	xyz(16.9596, 18.8783, 45.3891)
Luminance	0.1888 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337EB3 #B36833

analogous

#33B3A8 #337EB3 #333EB3

triadic

#337EB3 #B3337E #7EB333

tetradic

#337EB3 #A833B3 #B36833 #3EB333

square

#337EB3 #A833B3 #B36833 #3EB333

split-complementary

#337EB3 #B3333E #B3A833

monochromatic

#183B54 #255C83 #337EB3 #559CCE #84B8DC

Accessibility & contrast

On white

4.40

#337EB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#337EB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337EB3

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337EB3	#FFFFFF	#000000	##000000
##337EB3	1.00	4.40	4.78	4.78
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667FB5

Deuteranopia (green-blind)

#5473B2

Tritanopia (blue-blind)

#008B91

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337eb3;
/* rgb */ color: rgb(51, 126, 179);
/* oklch */ color: oklch(57.1% 0.110 243.0);

Tailwind

colors: {
  custom: {
    50: '#7ba3ca',
    500: '#337eb3',
    950: '#000000',
  },
}

SCSS

$custom: #337eb3;
$custom-light: #7ba3ca;
$custom-dark: #000000;

JSON

{
  "hex": "#337eb3",
  "rgb": {
    "r": 51,
    "g": 126,
    "b": 179
  },
  "hsl": {
    "h": 204.844,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.57078,
    "c": 0.11,
    "h": 243
  },
  "luminance": 0.1888
}

Semantic roles & 50–950 ramp

primary

#337EB3

secondary

#C69B7C

accent

#8749DF

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #337EB3

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

Preview Lab → · Contrast checker → · Palette generator →