#337BB0#337BB0

#337BB0 is a mid, moderate cyan. Relative luminance 0.180; OKLCH L 56.2% C 0.109 H 243.9°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#337BB0
RGB	rgb(51, 123, 176)
HSL	hsl(205, 55%, 45%)
HSV	hsv(205, 71%, 69%)
CMYK	cmyk(71%, 30.1%, 0%, 31%)
CIE-LAB	lab(49.50, -4.64, -34.58)
CIE-LCH	lch(49.50, 34.89, 262.36°)
OKLab	oklab(56.2% -0.0479 -0.0978)
OKLCH	oklch(56.2% 0.109 243.9)
XYZ	xyz(16.2817, 18.0025, 43.6826)
Luminance	0.1800 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BB0 #B06833

analogous

#33B0A7 #337BB0 #333DB0

triadic

#337BB0 #B0337B #7BB033

tetradic

#337BB0 #A733B0 #B06833 #3DB033

square

#337BB0 #A733B0 #B06833 #3DB033

split-complementary

#337BB0 #B0333D #B0A733

monochromatic

#183951 #255A81 #337BB0 #5399CD #82B5DB

Accessibility & contrast

On white

4.56

#337BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#337BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BB0

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BB0	#FFFFFF	#000000	##000000
##337BB0	1.00	4.56	4.60	4.60
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637CB2

Deuteranopia (green-blind)

#5270AF

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337bb0;
/* rgb */ color: rgb(51, 123, 176);
/* oklch */ color: oklch(56.2% 0.109 243.9);

Tailwind

colors: {
  custom: {
    50: '#7aa1c8',
    500: '#337bb0',
    950: '#000000',
  },
}

SCSS

$custom: #337bb0;
$custom-light: #7aa1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#337bb0",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 176
  },
  "hsl": {
    "h": 205.44,
    "s": 55.066,
    "l": 44.51
  },
  "oklch": {
    "l": 0.56204,
    "c": 0.10886,
    "h": 243.9
  },
  "luminance": 0.18004
}

Semantic roles & 50–950 ramp

primary

#337BB0

secondary

#C49A7B

accent

#8949DE

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #337BB0

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

Preview Lab → · Contrast checker → · Palette generator →