#3399B3#3399B3

#3399B3 is a light, moderate cyan. Relative luminance 0.267; OKLCH L 63.6% C 0.099 H 218.4°. Best body text is #000000 at 6.35:1 contrast (WCAG AA passes).

Color values

HEX	#3399B3
RGB	rgb(51, 153, 179)
HSL	hsl(192, 56%, 45%)
HSV	hsv(192, 72%, 70%)
CMYK	cmyk(71.5%, 14.5%, 0%, 29.8%)
CIE-LAB	lab(58.73, -20.38, -21.98)
CIE-LCH	lch(58.73, 29.97, 227.17°)
OKLab	oklab(63.61% -0.0773 -0.0613)
OKLCH	oklch(63.61% 0.099 218.4)
XYZ	xyz(20.8898, 26.7385, 46.6992)
Luminance	0.2674 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3399B3 #B34D33

analogous

#33B38D #3399B3 #3359B3

triadic

#3399B3 #B33399 #99B333

tetradic

#3399B3 #8D33B3 #B34D33 #59B333

square

#3399B3 #8D33B3 #B34D33 #59B333

split-complementary

#3399B3 #B33359 #B38D33

monochromatic

#184854 #257083 #3399B3 #55B6CE #84CADC

Accessibility & contrast

On white

3.31

#3399B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.35

#3399B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3399B3

6.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3399B3	#FFFFFF	#000000	##000000
##3399B3	1.00	3.31	6.35	6.35
#FFFFFF	3.31	1.00	21.00	21.00
#000000	6.35	21.00	1.00	1.00
##000000	6.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8895B4

Deuteranopia (green-blind)

#7788B3

Tritanopia (blue-blind)

#00A2A1

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #3399b3;
/* rgb */ color: rgb(51, 153, 179);
/* oklch */ color: oklch(63.6% 0.099 218.4);

Tailwind

colors: {
  custom: {
    50: '#7cb7c9',
    500: '#3399b3',
    950: '#000000',
  },
}

SCSS

$custom: #3399b3;
$custom-light: #7cb7c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3399b3",
  "rgb": {
    "r": 51,
    "g": 153,
    "b": 179
  },
  "hsl": {
    "h": 192.188,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.63606,
    "c": 0.09865,
    "h": 218.4
  },
  "luminance": 0.26741
}

Semantic roles & 50–950 ramp

primary

#3399B3

secondary

#C68B7C

accent

#6749DF

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3399B3

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

Preview Lab → · Contrast checker → · Palette generator →