#3F99BB#3F99BB

#3F99BB is a light, moderate cyan. Relative luminance 0.274; OKLCH L 64.3% C 0.098 H 226.4°. Best body text is #000000 at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#3F99BB
RGB	rgb(63, 153, 187)
HSL	hsl(196, 50%, 49%)
HSV	hsv(196, 66%, 73%)
CMYK	cmyk(66.3%, 18.2%, 0%, 26.7%)
CIE-LAB	lab(59.37, -15.97, -25.50)
CIE-LCH	lch(59.37, 30.09, 237.94°)
OKLab	oklab(64.31% -0.0678 -0.0713)
OKLCH	oklch(64.31% 0.098 226.4)
XYZ	xyz(22.4072, 27.4247, 51.1167)
Luminance	0.2743 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F99BB #BB613F

analogous

#3FBB9F #3F99BB #3F5BBB

triadic

#3F99BB #BB3F99 #99BB3F

tetradic

#3F99BB #9F3FBB #BB613F #5BBB3F

square

#3F99BB #9F3FBB #BB613F #5BBB3F

split-complementary

#3F99BB #BB3F5B #BB9F3F

monochromatic

#204E5F #30748D #3F99BB #6AB2CD #98CADC

Accessibility & contrast

On white

3.24

#3F99BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.49

#3F99BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F99BB

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F99BB	#FFFFFF	#000000	##000000
##3F99BB	1.00	3.24	6.49	6.49
#FFFFFF	3.24	1.00	21.00	21.00
#000000	6.49	21.00	1.00	1.00
##000000	6.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8796BD

Deuteranopia (green-blind)

#7589BB

Tritanopia (blue-blind)

#00A3A4

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #3f99bb;
/* rgb */ color: rgb(63, 153, 187);
/* oklch */ color: oklch(64.3% 0.098 226.4);

Tailwind

colors: {
  custom: {
    50: '#82b7cf',
    500: '#3f99bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f99bb;
$custom-light: #82b7cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f99bb",
  "rgb": {
    "r": 63,
    "g": 153,
    "b": 187
  },
  "hsl": {
    "h": 196.452,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.64308,
    "c": 0.09835,
    "h": 226.4
  },
  "luminance": 0.27427
}

Semantic roles & 50–950 ramp

primary

#3F99BB

secondary

#C89E8E

accent

#754FD9

background

#F8FBFC

surface

#F0F6F9

border

#CBD0D2

text

#0C1113

muted

#7D8082

Preview Lab

Preview with #3F99BB

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

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