#337FB5#337FB5

#337FB5 is a mid, moderate cyan. Relative luminance 0.192; OKLCH L 57.4% C 0.112 H 243.2°. Best body text is #000000 at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#337FB5
RGB	rgb(51, 127, 181)
HSL	hsl(205, 56%, 45%)
HSV	hsv(205, 72%, 71%)
CMYK	cmyk(71.8%, 29.8%, 0%, 29%)
CIE-LAB	lab(50.94, -5.22, -35.20)
CIE-LCH	lch(50.94, 35.59, 261.57°)
OKLab	oklab(57.42% -0.0503 -0.0995)
OKLCH	oklch(57.42% 0.112 243.2)
XYZ	xyz(17.2919, 19.2168, 46.5050)
Luminance	0.1922 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FB5 #B56933

analogous

#33B5AA #337FB5 #333EB5

triadic

#337FB5 #B5337F #7FB533

tetradic

#337FB5 #AA33B5 #B56933 #3EB533

square

#337FB5 #AA33B5 #B56933 #3EB533

split-complementary

#337FB5 #B5333E #B5AA33

monochromatic

#183C56 #265D85 #337FB5 #569DCF #86B9DD

Accessibility & contrast

On white

4.34

#337FB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.84

#337FB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FB5

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FB5	#FFFFFF	#000000	##000000
##337FB5	1.00	4.34	4.84	4.84
#FFFFFF	4.34	1.00	21.00	21.00
#000000	4.84	21.00	1.00	1.00
##000000	4.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6680B7

Deuteranopia (green-blind)

#5474B4

Tritanopia (blue-blind)

#008C92

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #337fb5;
/* rgb */ color: rgb(51, 127, 181);
/* oklch */ color: oklch(57.4% 0.112 243.2);

Tailwind

colors: {
  custom: {
    50: '#7ba3cb',
    500: '#337fb5',
    950: '#000000',
  },
}

SCSS

$custom: #337fb5;
$custom-light: #7ba3cb;
$custom-dark: #000000;

JSON

{
  "hex": "#337fb5",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 181
  },
  "hsl": {
    "h": 204.923,
    "s": 56.034,
    "l": 45.49
  },
  "oklch": {
    "l": 0.57421,
    "c": 0.11154,
    "h": 243.2
  },
  "luminance": 0.19219
}

Semantic roles & 50–950 ramp

primary

#337FB5

secondary

#C69C7D

accent

#8748DF

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #337FB5

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

Preview Lab → · Contrast checker → · Palette generator →