#337DB3#337DB3

#337DB3 is a mid, moderate cyan. Relative luminance 0.186; OKLCH L 56.8% C 0.111 H 243.8°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#337DB3
RGB	rgb(51, 125, 179)
HSL	hsl(205, 56%, 45%)
HSV	hsv(205, 72%, 70%)
CMYK	cmyk(71.5%, 30.2%, 0%, 29.8%)
CIE-LAB	lab(50.24, -4.75, -35.14)
CIE-LCH	lch(50.24, 35.46, 262.30°)
OKLab	oklab(56.84% -0.0489 -0.0994)
OKLCH	oklch(56.84% 0.111 243.8)
XYZ	xyz(16.8324, 18.6238, 45.3467)
Luminance	0.1863 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337DB3 #B36933

analogous

#33B3A9 #337DB3 #333DB3

triadic

#337DB3 #B3337D #7DB333

tetradic

#337DB3 #A933B3 #B36933 #3DB333

square

#337DB3 #A933B3 #B36933 #3DB333

split-complementary

#337DB3 #B3333D #B3A933

monochromatic

#183A54 #255C83 #337DB3 #559BCE #84B7DC

Accessibility & contrast

On white

4.44

#337DB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#337DB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337DB3

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337DB3	#FFFFFF	#000000	##000000
##337DB3	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647EB5

Deuteranopia (green-blind)

#5372B2

Tritanopia (blue-blind)

#008A90

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337db3;
/* rgb */ color: rgb(51, 125, 179);
/* oklch */ color: oklch(56.8% 0.111 243.8);

Tailwind

colors: {
  custom: {
    50: '#7ba2ca',
    500: '#337db3',
    950: '#000000',
  },
}

SCSS

$custom: #337db3;
$custom-light: #7ba2ca;
$custom-dark: #000000;

JSON

{
  "hex": "#337db3",
  "rgb": {
    "r": 51,
    "g": 125,
    "b": 179
  },
  "hsl": {
    "h": 205.313,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.5684,
    "c": 0.11079,
    "h": 243.8
  },
  "luminance": 0.18626
}

Semantic roles & 50–950 ramp

primary

#337DB3

secondary

#C69B7C

accent

#8849DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #337DB3

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

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