#337FBF#337FBF

#337FBF is a mid, vivid cyan. Relative luminance 0.196; OKLCH L 58.0% C 0.123 H 247.5°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#337FBF
RGB	rgb(51, 127, 191)
HSL	hsl(207, 58%, 47%)
HSV	hsv(207, 73%, 75%)
CMYK	cmyk(73.3%, 33.5%, 0%, 25.1%)
CIE-LAB	lab(51.43, -1.64, -40.18)
CIE-LCH	lch(51.43, 40.21, 267.66°)
OKLab	oklab(57.97% -0.0473 -0.114)
OKLCH	oklch(57.97% 0.123 247.5)
XYZ	xyz(18.3550, 19.6421, 52.1040)
Luminance	0.1964 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FBF #BF7333

analogous

#33BFB9 #337FBF #3339BF

triadic

#337FBF #BF337F #7FBF33

tetradic

#337FBF #B933BF #BF7333 #39BF33

square

#337FBF #B933BF #BF7333 #39BF33

split-complementary

#337FBF #BF3339 #BFB933

monochromatic

#193F5E #265F8F #337FBF #5C9DD3 #8CBAE0

Accessibility & contrast

On white

4.26

#337FBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#337FBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FBF

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FBF	#FFFFFF	#000000	##000000
##337FBF	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6282C2

Deuteranopia (green-blind)

#4E75BE

Tritanopia (blue-blind)

#008E96

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #337fbf;
/* rgb */ color: rgb(51, 127, 191);
/* oklch */ color: oklch(58.0% 0.123 247.5);

Tailwind

colors: {
  custom: {
    50: '#7da3d2',
    500: '#337fbf',
    950: '#000000',
  },
}

SCSS

$custom: #337fbf;
$custom-light: #7da3d2;
$custom-dark: #000000;

JSON

{
  "hex": "#337fbf",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 191
  },
  "hsl": {
    "h": 207.429,
    "s": 57.851,
    "l": 47.451
  },
  "oklch": {
    "l": 0.57969,
    "c": 0.12346,
    "h": 247.5
  },
  "luminance": 0.19644
}

Semantic roles & 50–950 ramp

primary

#337FBF

secondary

#CBA483

accent

#8D47E1

background

#F8FAFC

surface

#EFF3F9

border

#CACDD2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #337FBF

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

Preview Lab → · Contrast checker → · Palette generator →