#337EB1#337EB1

#337EB1 is a mid, moderate cyan. Relative luminance 0.188; OKLCH L 57.0% C 0.108 H 242.0°. Best body text is #000000 at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#337EB1
RGB	rgb(51, 126, 177)
HSL	hsl(204, 55%, 45%)
HSV	hsv(204, 71%, 69%)
CMYK	cmyk(71.2%, 28.8%, 0%, 30.6%)
CIE-LAB	lab(50.45, -6.05, -33.66)
CIE-LCH	lch(50.45, 34.20, 259.81°)
OKLab	oklab(56.97% -0.0506 -0.0951)
OKLCH	oklch(56.97% 0.108 242)
XYZ	xyz(16.7588, 18.7980, 44.3316)
Luminance	0.1880 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337EB1 #B16633

analogous

#33B1A5 #337EB1 #333FB1

triadic

#337EB1 #B1337E #7EB133

tetradic

#337EB1 #A533B1 #B16633 #3FB133

square

#337EB1 #A533B1 #B16633 #3FB133

split-complementary

#337EB1 #B1333F #B1A533

monochromatic

#183A52 #255C81 #337EB1 #549CCE #83B8DB

Accessibility & contrast

On white

4.41

#337EB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.76

#337EB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337EB1

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337EB1	#FFFFFF	#000000	##000000
##337EB1	1.00	4.41	4.76	4.76
#FFFFFF	4.41	1.00	21.00	21.00
#000000	4.76	21.00	1.00	1.00
##000000	4.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#677FB3

Deuteranopia (green-blind)

#5573B0

Tritanopia (blue-blind)

#008B90

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337eb1;
/* rgb */ color: rgb(51, 126, 177);
/* oklch */ color: oklch(57.0% 0.108 242.0);

Tailwind

colors: {
  custom: {
    50: '#7aa3c8',
    500: '#337eb1',
    950: '#000000',
  },
}

SCSS

$custom: #337eb1;
$custom-light: #7aa3c8;
$custom-dark: #000000;

JSON

{
  "hex": "#337eb1",
  "rgb": {
    "r": 51,
    "g": 126,
    "b": 177
  },
  "hsl": {
    "h": 204.286,
    "s": 55.263,
    "l": 44.706
  },
  "oklch": {
    "l": 0.56972,
    "c": 0.1077,
    "h": 242
  },
  "luminance": 0.188
}

Semantic roles & 50–950 ramp

primary

#337EB1

secondary

#C5997B

accent

#8649DF

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #337EB1

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

Preview Lab → · Contrast checker → · Palette generator →