#3370BB#3370BB

#3370BB is a mid, vivid cyan. Relative luminance 0.159; OKLCH L 54.3% C 0.133 H 255.2°. Best body text is #FFFFFF at 5.03:1 contrast (WCAG AA passes).

Color values

HEX	#3370BB
RGB	rgb(51, 112, 187)
HSL	hsl(213, 57%, 47%)
HSV	hsv(213, 73%, 73%)
CMYK	cmyk(72.7%, 40.1%, 0%, 26.7%)
CIE-LAB	lab(46.81, 6.05, -45.19)
CIE-LCH	lch(46.81, 45.59, 277.62°)
OKLab	oklab(54.29% -0.0342 -0.1289)
OKLCH	oklch(54.29% 0.133 255.2)
XYZ	xyz(16.1257, 15.8782, 49.2190)
Luminance	0.1588 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3370BB #BB7E33

analogous

#33B4BB #3370BB #3A33BB

triadic

#3370BB #BB3370 #70BB33

tetradic

#3370BB #BB33B4 #BB7E33 #33BB3A

square

#3370BB #BB33B4 #BB7E33 #33BB3A

split-complementary

#3370BB #BB3A33 #B4BB33

monochromatic

#19365B #26538B #3370BB #598FD2 #89B0DF

Accessibility & contrast

On white

5.03

#3370BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.18

#3370BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3370BB

5.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3370BB	#FFFFFF	#000000	##FFFFFF
##3370BB	1.00	5.03	4.18	5.03
#FFFFFF	5.03	1.00	21.00	1.00
#000000	4.18	21.00	1.00	21.00
##FFFFFF	5.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D76BE

Deuteranopia (green-blind)

#3769B9

Tritanopia (blue-blind)

#00828C

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #3370bb;
/* rgb */ color: rgb(51, 112, 187);
/* oklch */ color: oklch(54.3% 0.133 255.2);

Tailwind

colors: {
  custom: {
    50: '#7c98d0',
    500: '#3370bb',
    950: '#000000',
  },
}

SCSS

$custom: #3370bb;
$custom-light: #7c98d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3370bb",
  "rgb": {
    "r": 51,
    "g": 112,
    "b": 187
  },
  "hsl": {
    "h": 213.088,
    "s": 57.143,
    "l": 46.667
  },
  "oklch": {
    "l": 0.54286,
    "c": 0.13341,
    "h": 255.2
  },
  "luminance": 0.1588
}

Semantic roles & 50–950 ramp

primary

#3370BB

secondary

#C9A981

accent

#9C47E0

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3370BB

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

Preview Lab → · Contrast checker → · Palette generator →