#337BB8#337BB8

#337BB8 is a mid, moderate cyan. Relative luminance 0.183; OKLCH L 56.6% C 0.118 H 247.4°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#337BB8
RGB	rgb(51, 123, 184)
HSL	hsl(208, 57%, 46%)
HSV	hsv(208, 72%, 72%)
CMYK	cmyk(72.3%, 33.2%, 0%, 27.8%)
CIE-LAB	lab(49.89, -1.77, -38.58)
CIE-LCH	lch(49.89, 38.62, 267.37°)
OKLab	oklab(56.64% -0.0455 -0.1094)
OKLCH	oklch(56.64% 0.119 247.4)
XYZ	xyz(17.0966, 18.3285, 47.9748)
Luminance	0.1833 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BB8 #B87033

analogous

#33B8B2 #337BB8 #3338B8

triadic

#337BB8 #B8337B #7BB833

tetradic

#337BB8 #B233B8 #B87033 #38B833

square

#337BB8 #B233B8 #B87033 #38B833

split-complementary

#337BB8 #B83338 #B8B233

monochromatic

#183B58 #265B88 #337BB8 #5899D1 #88B6DE

Accessibility & contrast

On white

4.50

#337BB8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#337BB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BB8

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BB8	#FFFFFF	#000000	##000000
##337BB8	1.00	4.50	4.67	4.67
#FFFFFF	4.50	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)

#5F7EBB

Deuteranopia (green-blind)

#4D71B7

Tritanopia (blue-blind)

#008A91

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337bb8;
/* rgb */ color: rgb(51, 123, 184);
/* oklch */ color: oklch(56.6% 0.118 247.4);

Tailwind

colors: {
  custom: {
    50: '#7ba0cd',
    500: '#337bb8',
    950: '#000000',
  },
}

SCSS

$custom: #337bb8;
$custom-light: #7ba0cd;
$custom-dark: #000000;

JSON

{
  "hex": "#337bb8",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 184
  },
  "hsl": {
    "h": 207.519,
    "s": 56.596,
    "l": 46.078
  },
  "oklch": {
    "l": 0.56643,
    "c": 0.1185,
    "h": 247.4
  },
  "luminance": 0.1833
}

Semantic roles & 50–950 ramp

primary

#337BB8

secondary

#C8A07F

accent

#8E48E0

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #337BB8

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

Preview Lab → · Contrast checker → · Palette generator →