#337FB1#337FB1

#337FB1 is a mid, moderate cyan. Relative luminance 0.191; OKLCH L 57.2% C 0.107 H 241.2°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#337FB1
RGB	rgb(51, 127, 177)
HSL	hsl(204, 55%, 45%)
HSV	hsv(204, 71%, 69%)
CMYK	cmyk(71.2%, 28.2%, 0%, 30.6%)
CIE-LAB	lab(50.75, -6.63, -33.19)
CIE-LCH	lch(50.75, 33.85, 258.70°)
OKLab	oklab(57.21% -0.0516 -0.0937)
OKLCH	oklch(57.21% 0.107 241.2)
XYZ	xyz(16.8874, 19.0550, 44.3744)
Luminance	0.1906 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FB1 #B16533

analogous

#33B1A4 #337FB1 #3340B1

triadic

#337FB1 #B1337F #7FB133

tetradic

#337FB1 #A433B1 #B16533 #40B133

square

#337FB1 #A433B1 #B16533 #40B133

split-complementary

#337FB1 #B13340 #B1A433

monochromatic

#183B52 #255D81 #337FB1 #549DCE #83B8DB

Accessibility & contrast

On white

4.36

#337FB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#337FB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FB1

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FB1	#FFFFFF	#000000	##000000
##337FB1	1.00	4.36	4.81	4.81
#FFFFFF	4.36	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6880B3

Deuteranopia (green-blind)

#5773B0

Tritanopia (blue-blind)

#008B90

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #337fb1;
/* rgb */ color: rgb(51, 127, 177);
/* oklch */ color: oklch(57.2% 0.107 241.2);

Tailwind

colors: {
  custom: {
    50: '#7aa4c8',
    500: '#337fb1',
    950: '#000000',
  },
}

SCSS

$custom: #337fb1;
$custom-light: #7aa4c8;
$custom-dark: #000000;

JSON

{
  "hex": "#337fb1",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 177
  },
  "hsl": {
    "h": 203.81,
    "s": 55.263,
    "l": 44.706
  },
  "oklch": {
    "l": 0.5721,
    "c": 0.10697,
    "h": 241.2
  },
  "luminance": 0.19057
}

Semantic roles & 50–950 ramp

primary

#337FB1

secondary

#C5987B

accent

#8449DF

background

#F8FAFC

surface

#EFF3F8

border

#CACDD1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #337FB1

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

Preview Lab → · Contrast checker → · Palette generator →