#3391BB#3391BB

#3391BB is a light, moderate cyan. Relative luminance 0.245; OKLCH L 62.0% C 0.107 H 231.7°. Best body text is #000000 at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#3391BB
RGB	rgb(51, 145, 187)
HSL	hsl(199, 57%, 47%)
HSV	hsv(199, 73%, 73%)
CMYK	cmyk(72.7%, 22.5%, 0%, 26.7%)
CIE-LAB	lab(56.62, -13.39, -29.76)
CIE-LCH	lch(56.62, 32.64, 245.77°)
OKLab	oklab(62.03% -0.0662 -0.0836)
OKLCH	oklch(62.03% 0.107 231.7)
XYZ	xyz(20.4567, 24.5401, 50.6627)
Luminance	0.2454 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3391BB #BB5D33

analogous

#33BBA1 #3391BB #334DBB

triadic

#3391BB #BB3391 #91BB33

tetradic

#3391BB #A133BB #BB5D33 #4DBB33

square

#3391BB #A133BB #BB5D33 #4DBB33

split-complementary

#3391BB #BB334D #BBA133

monochromatic

#19465B #266C8B #3391BB #59ADD2 #89C5DF

Accessibility & contrast

On white

3.55

#3391BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.91

#3391BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3391BB

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3391BB	#FFFFFF	#000000	##000000
##3391BB	1.00	3.55	5.91	5.91
#FFFFFF	3.55	1.00	21.00	21.00
#000000	5.91	21.00	1.00	1.00
##000000	5.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8FBD

Deuteranopia (green-blind)

#6982BA

Tritanopia (blue-blind)

#009C9F

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #3391bb;
/* rgb */ color: rgb(51, 145, 187);
/* oklch */ color: oklch(62.0% 0.107 231.7);

Tailwind

colors: {
  custom: {
    50: '#7db1cf',
    500: '#3391bb',
    950: '#000000',
  },
}

SCSS

$custom: #3391bb;
$custom-light: #7db1cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3391bb",
  "rgb": {
    "r": 51,
    "g": 145,
    "b": 187
  },
  "hsl": {
    "h": 198.529,
    "s": 57.143,
    "l": 46.667
  },
  "oklch": {
    "l": 0.62025,
    "c": 0.10665,
    "h": 231.7
  },
  "luminance": 0.24542
}

Semantic roles & 50–950 ramp

primary

#3391BB

secondary

#C99781

accent

#7747E0

background

#F8FAFC

surface

#EFF5F9

border

#CACFD2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3391BB

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

Preview Lab → · Contrast checker → · Palette generator →