#337DB5#337DB5

#337DB5 is a mid, moderate cyan. Relative luminance 0.187; OKLCH L 56.9% C 0.113 H 244.7°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#337DB5
RGB	rgb(51, 125, 181)
HSL	hsl(206, 56%, 45%)
HSV	hsv(206, 72%, 71%)
CMYK	cmyk(71.8%, 30.9%, 0%, 29%)
CIE-LAB	lab(50.34, -4.04, -36.15)
CIE-LCH	lch(50.34, 36.37, 263.63°)
OKLab	oklab(56.95% -0.0483 -0.1023)
OKLCH	oklch(56.95% 0.113 244.7)
XYZ	xyz(17.0362, 18.7053, 46.4197)
Luminance	0.1871 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337DB5 #B56B33

analogous

#33B5AC #337DB5 #333CB5

triadic

#337DB5 #B5337D #7DB533

tetradic

#337DB5 #AC33B5 #B56B33 #3CB533

square

#337DB5 #AC33B5 #B56B33 #3CB533

split-complementary

#337DB5 #B5333C #B5AC33

monochromatic

#183B56 #265C85 #337DB5 #569BCF #86B7DD

Accessibility & contrast

On white

4.43

#337DB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#337DB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337DB5

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337DB5	#FFFFFF	#000000	##000000
##337DB5	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647FB7

Deuteranopia (green-blind)

#5172B4

Tritanopia (blue-blind)

#008B91

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337db5;
/* rgb */ color: rgb(51, 125, 181);
/* oklch */ color: oklch(56.9% 0.113 244.7);

Tailwind

colors: {
  custom: {
    50: '#7ba2cb',
    500: '#337db5',
    950: '#000000',
  },
}

SCSS

$custom: #337db5;
$custom-light: #7ba2cb;
$custom-dark: #000000;

JSON

{
  "hex": "#337db5",
  "rgb": {
    "r": 51,
    "g": 125,
    "b": 181
  },
  "hsl": {
    "h": 205.846,
    "s": 56.034,
    "l": 45.49
  },
  "oklch": {
    "l": 0.56948,
    "c": 0.11315,
    "h": 244.7
  },
  "luminance": 0.18707
}

Semantic roles & 50–950 ramp

primary

#337DB5

secondary

#C69D7D

accent

#8948DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #337DB5

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

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