#3399BB#3399BB

#3399BB is a light, moderate cyan. Relative luminance 0.271; OKLCH L 64.0% C 0.104 H 224.5°. Best body text is #000000 at 6.41:1 contrast (WCAG AA passes).

Color values

HEX	#3399BB
RGB	rgb(51, 153, 187)
HSL	hsl(195, 57%, 47%)
HSV	hsv(195, 73%, 73%)
CMYK	cmyk(72.7%, 18.2%, 0%, 26.7%)
CIE-LAB	lab(59.04, -17.75, -26.03)
CIE-LCH	lch(59.04, 31.51, 235.70°)
OKLab	oklab(63.96% -0.0741 -0.0729)
OKLCH	oklch(63.96% 0.104 224.5)
XYZ	xyz(21.7224, 27.0716, 51.0846)
Luminance	0.2707 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3399BB #BB5533

analogous

#33BB99 #3399BB #3355BB

triadic

#3399BB #BB3399 #99BB33

tetradic

#3399BB #9933BB #BB5533 #55BB33

square

#3399BB #9933BB #BB5533 #55BB33

split-complementary

#3399BB #BB3355 #BB9933

monochromatic

#194A5B #26728B #3399BB #59B4D2 #89CADF

Accessibility & contrast

On white

3.27

#3399BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.41

#3399BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3399BB

6.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3399BB	#FFFFFF	#000000	##000000
##3399BB	1.00	3.27	6.41	6.41
#FFFFFF	3.27	1.00	21.00	21.00
#000000	6.41	21.00	1.00	1.00
##000000	6.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8696BD

Deuteranopia (green-blind)

#7388BB

Tritanopia (blue-blind)

#00A3A4

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #3399bb;
/* rgb */ color: rgb(51, 153, 187);
/* oklch */ color: oklch(64.0% 0.104 224.5);

Tailwind

colors: {
  custom: {
    50: '#7db7cf',
    500: '#3399bb',
    950: '#000000',
  },
}

SCSS

$custom: #3399bb;
$custom-light: #7db7cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3399bb",
  "rgb": {
    "r": 51,
    "g": 153,
    "b": 187
  },
  "hsl": {
    "h": 195,
    "s": 57.143,
    "l": 46.667
  },
  "oklch": {
    "l": 0.63956,
    "c": 0.10396,
    "h": 224.5
  },
  "luminance": 0.27074
}

Semantic roles & 50–950 ramp

primary

#3399BB

secondary

#C99381

accent

#6E47E0

background

#F8FBFC

surface

#EFF6F9

border

#CAD0D2

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3399BB

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

Preview Lab → · Contrast checker → · Palette generator →