#337BB5#337BB5

#337BB5 is a mid, moderate cyan. Relative luminance 0.182; OKLCH L 56.5% C 0.115 H 246.2°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#337BB5
RGB	rgb(51, 123, 181)
HSL	hsl(207, 56%, 45%)
HSV	hsv(207, 72%, 71%)
CMYK	cmyk(71.8%, 32%, 0%, 29%)
CIE-LAB	lab(49.74, -2.85, -37.09)
CIE-LCH	lch(49.74, 37.20, 265.60°)
OKLab	oklab(56.48% -0.0463 -0.1051)
OKLCH	oklch(56.48% 0.115 246.2)
XYZ	xyz(16.7855, 18.2041, 46.3362)
Luminance	0.1821 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BB5 #B56D33

analogous

#33B5AE #337BB5 #333AB5

triadic

#337BB5 #B5337B #7BB533

tetradic

#337BB5 #AE33B5 #B56D33 #3AB533

square

#337BB5 #AE33B5 #B56D33 #3AB533

split-complementary

#337BB5 #B5333A #B5AE33

monochromatic

#183A56 #265B85 #337BB5 #5699CF #86B6DD

Accessibility & contrast

On white

4.52

#337BB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#337BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BB5

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BB5	#FFFFFF	#000000	##000000
##337BB5	1.00	4.52	4.64	4.64
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#617DB8

Deuteranopia (green-blind)

#4F71B4

Tritanopia (blue-blind)

#008990

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337bb5;
/* rgb */ color: rgb(51, 123, 181);
/* oklch */ color: oklch(56.5% 0.115 246.2);

Tailwind

colors: {
  custom: {
    50: '#7ba0cb',
    500: '#337bb5',
    950: '#000000',
  },
}

SCSS

$custom: #337bb5;
$custom-light: #7ba0cb;
$custom-dark: #000000;

JSON

{
  "hex": "#337bb5",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 181
  },
  "hsl": {
    "h": 206.769,
    "s": 56.034,
    "l": 45.49
  },
  "oklch": {
    "l": 0.56476,
    "c": 0.11484,
    "h": 246.2
  },
  "luminance": 0.18206
}

Semantic roles & 50–950 ramp

primary

#337BB5

secondary

#C69E7D

accent

#8C48DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #337BB5

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

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