#3999BF#3999BF

#3999BF is a light, moderate cyan. Relative luminance 0.274; OKLCH L 64.3% C 0.104 H 228.2°. Best body text is #000000 at 6.48:1 contrast (WCAG AA passes).

Color values

HEX	#3999BF
RGB	rgb(57, 153, 191)
HSL	hsl(197, 54%, 49%)
HSV	hsv(197, 70%, 75%)
CMYK	cmyk(70.2%, 19.9%, 0%, 25.1%)
CIE-LAB	lab(59.35, -15.59, -27.79)
CIE-LCH	lch(59.35, 31.86, 240.70°)
OKLab	oklab(64.3% -0.0696 -0.0779)
OKLCH	oklch(64.3% 0.104 228.2)
XYZ	xyz(22.4788, 27.4114, 53.3864)
Luminance	0.2741 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3999BF #BF5F39

analogous

#39BFA2 #3999BF #3956BF

triadic

#3999BF #BF3999 #99BF39

tetradic

#3999BF #A239BF #BF5F39 #56BF39

square

#3999BF #A239BF #BF5F39 #56BF39

split-complementary

#3999BF #BF3956 #BFA239

monochromatic

#1D4D61 #2B7390 #3999BF #64B2D1 #93CADF

Accessibility & contrast

On white

3.24

#3999BF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.48

#3999BF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3999BF

6.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3999BF	#FFFFFF	#000000	##000000
##3999BF	1.00	3.24	6.48	6.48
#FFFFFF	3.24	1.00	21.00	21.00
#000000	6.48	21.00	1.00	1.00
##000000	6.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8596C1

Deuteranopia (green-blind)

#7389BF

Tritanopia (blue-blind)

#00A4A5

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #3999bf;
/* rgb */ color: rgb(57, 153, 191);
/* oklch */ color: oklch(64.3% 0.104 228.2);

Tailwind

colors: {
  custom: {
    50: '#80b7d2',
    500: '#3999bf',
    950: '#000000',
  },
}

SCSS

$custom: #3999bf;
$custom-light: #80b7d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3999bf",
  "rgb": {
    "r": 57,
    "g": 153,
    "b": 191
  },
  "hsl": {
    "h": 197.015,
    "s": 54.032,
    "l": 48.627
  },
  "oklch": {
    "l": 0.64302,
    "c": 0.10446,
    "h": 228.2
  },
  "luminance": 0.27414
}

Semantic roles & 50–950 ramp

primary

#3999BF

secondary

#CA9C8A

accent

#744ADD

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0B1114

muted

#7C8082

Preview Lab

Preview with #3999BF

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

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