#337CB3#337CB3

#337CB3 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.6% C 0.112 H 244.6°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#337CB3
RGB	rgb(51, 124, 179)
HSL	hsl(206, 56%, 45%)
HSV	hsv(206, 72%, 70%)
CMYK	cmyk(71.5%, 30.7%, 0%, 29.8%)
CIE-LAB	lab(49.94, -4.16, -35.61)
CIE-LCH	lch(49.94, 35.86, 263.34°)
OKLab	oklab(56.6% -0.0479 -0.1008)
OKLCH	oklch(56.6% 0.112 244.6)
XYZ	xyz(16.7065, 18.3719, 45.3048)
Luminance	0.1837 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337CB3 #B36A33

analogous

#33B3AA #337CB3 #333CB3

triadic

#337CB3 #B3337C #7CB333

tetradic

#337CB3 #AA33B3 #B36A33 #3CB333

square

#337CB3 #AA33B3 #B36A33 #3CB333

split-complementary

#337CB3 #B3333C #B3AA33

monochromatic

#183A54 #255B83 #337CB3 #559ACE #84B6DC

Accessibility & contrast

On white

4.49

#337CB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.67

#337CB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337CB3

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337CB3	#FFFFFF	#000000	##000000
##337CB3	1.00	4.49	4.67	4.67
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637EB5

Deuteranopia (green-blind)

#5171B2

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337cb3;
/* rgb */ color: rgb(51, 124, 179);
/* oklch */ color: oklch(56.6% 0.112 244.6);

Tailwind

colors: {
  custom: {
    50: '#7ba1ca',
    500: '#337cb3',
    950: '#000000',
  },
}

SCSS

$custom: #337cb3;
$custom-light: #7ba1ca;
$custom-dark: #000000;

JSON

{
  "hex": "#337cb3",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 179
  },
  "hsl": {
    "h": 205.781,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.56603,
    "c": 0.11159,
    "h": 244.6
  },
  "luminance": 0.18374
}

Semantic roles & 50–950 ramp

primary

#337CB3

secondary

#C69C7C

accent

#8949DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #337CB3

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

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