#3370B1#3370B1

#3370B1 is a mid, vivid cyan. Relative luminance 0.155; OKLCH L 53.7% C 0.120 H 252.2°. Best body text is #FFFFFF at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#3370B1
RGB	rgb(51, 112, 177)
HSL	hsl(211, 55%, 45%)
HSV	hsv(211, 71%, 69%)
CMYK	cmyk(71.2%, 36.7%, 0%, 30.6%)
CIE-LAB	lab(46.26, 2.37, -40.26)
CIE-LCH	lch(46.26, 40.33, 273.37°)
OKLab	oklab(53.68% -0.0366 -0.1145)
OKLCH	oklch(53.68% 0.12 252.2)
XYZ	xyz(15.0923, 15.4648, 43.7761)
Luminance	0.1547 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3370B1 #B17433

analogous

#33AFB1 #3370B1 #3533B1

triadic

#3370B1 #B13370 #70B133

tetradic

#3370B1 #B133AF #B17433 #33B135

square

#3370B1 #B133AF #B17433 #33B135

split-complementary

#3370B1 #B13533 #AFB133

monochromatic

#183452 #255281 #3370B1 #548FCE #83AEDB

Accessibility & contrast

On white

5.13

#3370B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.09

#3370B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3370B1

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3370B1	#FFFFFF	#000000	##FFFFFF
##3370B1	1.00	5.13	4.09	5.13
#FFFFFF	5.13	1.00	21.00	1.00
#000000	4.09	21.00	1.00	21.00
##FFFFFF	5.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5374B4

Deuteranopia (green-blind)

#4068B0

Tritanopia (blue-blind)

#007F88

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #3370b1;
/* rgb */ color: rgb(51, 112, 177);
/* oklch */ color: oklch(53.7% 0.120 252.2);

Tailwind

colors: {
  custom: {
    50: '#7a98c8',
    500: '#3370b1',
    950: '#000000',
  },
}

SCSS

$custom: #3370b1;
$custom-light: #7a98c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3370b1",
  "rgb": {
    "r": 51,
    "g": 112,
    "b": 177
  },
  "hsl": {
    "h": 210.952,
    "s": 55.263,
    "l": 44.706
  },
  "oklch": {
    "l": 0.53678,
    "c": 0.12021,
    "h": 252.2
  },
  "luminance": 0.15466
}

Semantic roles & 50–950 ramp

primary

#3370B1

secondary

#C5A17B

accent

#9649DF

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0D13

muted

#7C7E82

Preview Lab

Preview with #3370B1

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

Preview Lab → · Contrast checker → · Palette generator →