#3399B1#3399B1

#3399B1 is a light, moderate cyan. Relative luminance 0.267; OKLCH L 63.5% C 0.098 H 216.8°. Best body text is #000000 at 6.33:1 contrast (WCAG AA passes).

Color values

HEX	#3399B1
RGB	rgb(51, 153, 177)
HSL	hsl(191, 55%, 45%)
HSV	hsv(191, 71%, 69%)
CMYK	cmyk(71.2%, 13.6%, 0%, 30.6%)
CIE-LAB	lab(58.66, -21.02, -20.96)
CIE-LCH	lch(58.66, 29.69, 224.91°)
OKLab	oklab(63.52% -0.0781 -0.0584)
OKLCH	oklch(63.52% 0.098 216.8)
XYZ	xyz(20.6890, 26.6582, 45.6416)
Luminance	0.2666 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3399B1 #B14B33

analogous

#33B18A #3399B1 #335AB1

triadic

#3399B1 #B13399 #99B133

tetradic

#3399B1 #8A33B1 #B14B33 #5AB133

square

#3399B1 #8A33B1 #B14B33 #5AB133

split-complementary

#3399B1 #B1335A #B18A33

monochromatic

#184752 #257081 #3399B1 #54B6CE #83CADB

Accessibility & contrast

On white

3.32

#3399B1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.33

#3399B1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3399B1

6.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3399B1	#FFFFFF	#000000	##000000
##3399B1	1.00	3.32	6.33	6.33
#FFFFFF	3.32	1.00	21.00	21.00
#000000	6.33	21.00	1.00	1.00
##000000	6.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8994B2

Deuteranopia (green-blind)

#7788B1

Tritanopia (blue-blind)

#00A1A1

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #3399b1;
/* rgb */ color: rgb(51, 153, 177);
/* oklch */ color: oklch(63.5% 0.098 216.8);

Tailwind

colors: {
  custom: {
    50: '#7cb7c8',
    500: '#3399b1',
    950: '#000000',
  },
}

SCSS

$custom: #3399b1;
$custom-light: #7cb7c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3399b1",
  "rgb": {
    "r": 51,
    "g": 153,
    "b": 177
  },
  "hsl": {
    "h": 191.429,
    "s": 55.263,
    "l": 44.706
  },
  "oklch": {
    "l": 0.63521,
    "c": 0.09752,
    "h": 216.8
  },
  "luminance": 0.26661
}

Semantic roles & 50–950 ramp

primary

#3399B1

secondary

#C5897B

accent

#6649DF

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3399B1

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

Preview Lab → · Contrast checker → · Palette generator →