#3370B3#3370B3

#3370B3 is a mid, vivid cyan. Relative luminance 0.155; OKLCH L 53.8% C 0.123 H 252.9°. Best body text is #FFFFFF at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#3370B3
RGB	rgb(51, 112, 179)
HSL	hsl(211, 56%, 45%)
HSV	hsv(211, 72%, 70%)
CMYK	cmyk(71.5%, 37.4%, 0%, 29.8%)
CIE-LAB	lab(46.37, 3.10, -41.25)
CIE-LCH	lch(46.37, 41.37, 274.30°)
OKLab	oklab(53.8% -0.0361 -0.1174)
OKLCH	oklch(53.8% 0.123 252.9)
XYZ	xyz(15.2931, 15.5452, 44.8336)
Luminance	0.1555 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3370B3 #B37633

analogous

#33B0B3 #3370B3 #3633B3

triadic

#3370B3 #B33370 #70B333

tetradic

#3370B3 #B333B0 #B37633 #33B336

square

#3370B3 #B333B0 #B37633 #33B336

split-complementary

#3370B3 #B33633 #B0B333

monochromatic

#183454 #255283 #3370B3 #558FCE #84AEDC

Accessibility & contrast

On white

5.11

#3370B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.11

#3370B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3370B3

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3370B3	#FFFFFF	#000000	##FFFFFF
##3370B3	1.00	5.11	4.11	5.11
#FFFFFF	5.11	1.00	21.00	1.00
#000000	4.11	21.00	1.00	21.00
##FFFFFF	5.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5174B6

Deuteranopia (green-blind)

#3E68B2

Tritanopia (blue-blind)

#008089

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #3370b3;
/* rgb */ color: rgb(51, 112, 179);
/* oklch */ color: oklch(53.8% 0.123 252.9);

Tailwind

colors: {
  custom: {
    50: '#7a98ca',
    500: '#3370b3',
    950: '#000000',
  },
}

SCSS

$custom: #3370b3;
$custom-light: #7a98ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3370b3",
  "rgb": {
    "r": 51,
    "g": 112,
    "b": 179
  },
  "hsl": {
    "h": 211.406,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.53797,
    "c": 0.12283,
    "h": 252.9
  },
  "luminance": 0.15547
}

Semantic roles & 50–950 ramp

primary

#3370B3

secondary

#C6A37C

accent

#9749DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0D13

muted

#7C7E82

Preview Lab

Preview with #3370B3

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

Preview Lab → · Contrast checker → · Palette generator →