#3999BB#3999BB

#3999BB is a light, moderate cyan. Relative luminance 0.272; OKLCH L 64.1% C 0.101 H 225.4°. Best body text is #000000 at 6.45:1 contrast (WCAG AA passes).

Color values

HEX	#3999BB
RGB	rgb(57, 153, 187)
HSL	hsl(196, 53%, 48%)
HSV	hsv(196, 70%, 73%)
CMYK	cmyk(69.5%, 18.2%, 0%, 26.7%)
CIE-LAB	lab(59.19, -16.91, -25.78)
CIE-LCH	lch(59.19, 30.83, 236.74°)
OKLab	oklab(64.12% -0.0711 -0.0721)
OKLCH	oklch(64.12% 0.101 225.4)
XYZ	xyz(22.0446, 27.2377, 51.0997)
Luminance	0.2724 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3999BB #BB5B39

analogous

#39BB9C #3999BB #3958BB

triadic

#3999BB #BB3999 #99BB39

tetradic

#3999BB #9C39BB #BB5B39 #58BB39

square

#3999BB #9C39BB #BB5B39 #58BB39

split-complementary

#3999BB #BB3958 #BB9C39

monochromatic

#1C4C5D #2B738C #3999BB #62B3CF #91C9DD

Accessibility & contrast

On white

3.26

#3999BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.45

#3999BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3999BB

6.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3999BB	#FFFFFF	#000000	##000000
##3999BB	1.00	3.26	6.45	6.45
#FFFFFF	3.26	1.00	21.00	21.00
#000000	6.45	21.00	1.00	1.00
##000000	6.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8696BD

Deuteranopia (green-blind)

#7489BB

Tritanopia (blue-blind)

#00A3A4

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #3999bb;
/* rgb */ color: rgb(57, 153, 187);
/* oklch */ color: oklch(64.1% 0.101 225.4);

Tailwind

colors: {
  custom: {
    50: '#7fb7cf',
    500: '#3999bb',
    950: '#000000',
  },
}

SCSS

$custom: #3999bb;
$custom-light: #7fb7cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3999bb",
  "rgb": {
    "r": 57,
    "g": 153,
    "b": 187
  },
  "hsl": {
    "h": 195.692,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.64122,
    "c": 0.10129,
    "h": 225.4
  },
  "luminance": 0.2724
}

Semantic roles & 50–950 ramp

primary

#3999BB

secondary

#C89887

accent

#714BDD

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3999BB

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

Preview Lab → · Contrast checker → · Palette generator →