#337FB9#337FB9

#337FB9 is a mid, moderate cyan. Relative luminance 0.194; OKLCH L 57.6% C 0.116 H 245.0°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#337FB9
RGB	rgb(51, 127, 185)
HSL	hsl(206, 57%, 46%)
HSV	hsv(206, 72%, 73%)
CMYK	cmyk(72.4%, 31.4%, 0%, 27.5%)
CIE-LAB	lab(51.13, -3.79, -37.20)
CIE-LCH	lch(51.13, 37.40, 264.18°)
OKLab	oklab(57.64% -0.0491 -0.1054)
OKLCH	oklch(57.64% 0.116 245)
XYZ	xyz(17.7082, 19.3833, 48.6976)
Luminance	0.1938 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FB9 #B96D33

analogous

#33B9B0 #337FB9 #333CB9

triadic

#337FB9 #B9337F #7FB933

tetradic

#337FB9 #B033B9 #B96D33 #3CB933

square

#337FB9 #B033B9 #B96D33 #3CB933

split-complementary

#337FB9 #B9333C #B9B033

monochromatic

#193D59 #265E89 #337FB9 #589DD1 #88B9DE

Accessibility & contrast

On white

4.31

#337FB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#337FB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FB9

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FB9	#FFFFFF	#000000	##000000
##337FB9	1.00	4.31	4.88	4.88
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6581BC

Deuteranopia (green-blind)

#5274B8

Tritanopia (blue-blind)

#008D94

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #337fb9;
/* rgb */ color: rgb(51, 127, 185);
/* oklch */ color: oklch(57.6% 0.116 245.0);

Tailwind

colors: {
  custom: {
    50: '#7ca3ce',
    500: '#337fb9',
    950: '#000000',
  },
}

SCSS

$custom: #337fb9;
$custom-light: #7ca3ce;
$custom-dark: #000000;

JSON

{
  "hex": "#337fb9",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 185
  },
  "hsl": {
    "h": 205.97,
    "s": 56.78,
    "l": 46.275
  },
  "oklch": {
    "l": 0.57637,
    "c": 0.11622,
    "h": 245
  },
  "luminance": 0.19385
}

Semantic roles & 50–950 ramp

primary

#337FB9

secondary

#C89F80

accent

#8A48E0

background

#F8FAFC

surface

#EFF3F9

border

#CACDD2

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #337FB9

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

Preview Lab → · Contrast checker → · Palette generator →