#337BB3#337BB3

#337BB3 is a mid, moderate cyan. Relative luminance 0.181; OKLCH L 56.4% C 0.112 H 245.3°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#337BB3
RGB	rgb(51, 123, 179)
HSL	hsl(206, 56%, 45%)
HSV	hsv(206, 72%, 70%)
CMYK	cmyk(71.5%, 31.3%, 0%, 29.8%)
CIE-LAB	lab(49.64, -3.57, -36.09)
CIE-LCH	lch(49.64, 36.26, 264.36°)
OKLab	oklab(56.37% -0.0469 -0.1022)
OKLCH	oklch(56.37% 0.112 245.3)
XYZ	xyz(16.5818, 18.1226, 45.2632)
Luminance	0.1812 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BB3 #B36B33

analogous

#33B3AB #337BB3 #333BB3

triadic

#337BB3 #B3337B #7BB333

tetradic

#337BB3 #AB33B3 #B36B33 #3BB333

square

#337BB3 #AB33B3 #B36B33 #3BB333

split-complementary

#337BB3 #B3333B #B3AB33

monochromatic

#183A54 #255A83 #337BB3 #5599CE #84B6DC

Accessibility & contrast

On white

4.54

#337BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#337BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BB3

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BB3	#FFFFFF	#000000	##000000
##337BB3	1.00	4.54	4.62	4.62
#FFFFFF	4.54	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)

#627DB5

Deuteranopia (green-blind)

#5071B2

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337bb3;
/* rgb */ color: rgb(51, 123, 179);
/* oklch */ color: oklch(56.4% 0.112 245.3);

Tailwind

colors: {
  custom: {
    50: '#7aa0ca',
    500: '#337bb3',
    950: '#000000',
  },
}

SCSS

$custom: #337bb3;
$custom-light: #7aa0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#337bb3",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 179
  },
  "hsl": {
    "h": 206.25,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.56367,
    "c": 0.11243,
    "h": 245.3
  },
  "luminance": 0.18124
}

Semantic roles & 50–950 ramp

primary

#337BB3

secondary

#C69C7C

accent

#8B49DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #337BB3

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

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