#337DB1#337DB1

#337DB1 is a mid, moderate cyan. Relative luminance 0.185; OKLCH L 56.7% C 0.108 H 242.8°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#337DB1
RGB	rgb(51, 125, 177)
HSL	hsl(205, 55%, 45%)
HSV	hsv(205, 71%, 69%)
CMYK	cmyk(71.2%, 29.4%, 0%, 30.6%)
CIE-LAB	lab(50.15, -5.46, -34.14)
CIE-LCH	lch(50.15, 34.57, 260.91°)
OKLab	oklab(56.73% -0.0496 -0.0965)
OKLCH	oklch(56.73% 0.108 242.8)
XYZ	xyz(16.6316, 18.5435, 44.2892)
Luminance	0.1855 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337DB1 #B16733

analogous

#33B1A6 #337DB1 #333EB1

triadic

#337DB1 #B1337D #7DB133

tetradic

#337DB1 #A633B1 #B16733 #3EB133

square

#337DB1 #A633B1 #B16733 #3EB133

split-complementary

#337DB1 #B1333E #B1A633

monochromatic

#183A52 #255B81 #337DB1 #549BCE #83B7DB

Accessibility & contrast

On white

4.46

#337DB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#337DB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337DB1

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337DB1	#FFFFFF	#000000	##000000
##337DB1	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#657EB3

Deuteranopia (green-blind)

#5472B0

Tritanopia (blue-blind)

#008A8F

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337db1;
/* rgb */ color: rgb(51, 125, 177);
/* oklch */ color: oklch(56.7% 0.108 242.8);

Tailwind

colors: {
  custom: {
    50: '#7aa2c8',
    500: '#337db1',
    950: '#000000',
  },
}

SCSS

$custom: #337db1;
$custom-light: #7aa2c8;
$custom-dark: #000000;

JSON

{
  "hex": "#337db1",
  "rgb": {
    "r": 51,
    "g": 125,
    "b": 177
  },
  "hsl": {
    "h": 204.762,
    "s": 55.263,
    "l": 44.706
  },
  "oklch": {
    "l": 0.56733,
    "c": 0.10846,
    "h": 242.8
  },
  "luminance": 0.18545
}

Semantic roles & 50–950 ramp

primary

#337DB1

secondary

#C5997B

accent

#8749DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #337DB1

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

Preview Lab → · Contrast checker → · Palette generator →