#3F9FCB#3F9FCB

#3F9FCB is a light, moderate cyan. Relative luminance 0.302; OKLCH L 66.5% C 0.110 H 231.7°. Best body text is #000000 at 7.03:1 contrast (WCAG AA passes).

Color values

HEX	#3F9FCB
RGB	rgb(63, 159, 203)
HSL	hsl(199, 57%, 52%)
HSV	hsv(199, 69%, 80%)
CMYK	cmyk(69%, 21.7%, 0%, 20.4%)
CIE-LAB	lab(61.79, -14.01, -30.73)
CIE-LCH	lch(61.79, 33.77, 245.49°)
OKLab	oklab(66.46% -0.0681 -0.0862)
OKLCH	oklch(66.46% 0.11 231.7)
XYZ	xyz(25.2232, 30.1620, 60.9809)
Luminance	0.3016 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9FCB #CB6B3F

analogous

#3FCBB1 #3F9FCB #3F59CB

triadic

#3F9FCB #CB3F9F #9FCB3F

tetradic

#3F9FCB #B13FCB #CB6B3F #59CB3F

square

#3F9FCB #B13FCB #CB6B3F #59CB3F

split-complementary

#3F9FCB #CB3F59 #CBB13F

monochromatic

#1F5771 #2C7CA1 #3F9FCB #6FB7D8 #9FCFE5

Accessibility & contrast

On white

2.99

#3F9FCB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.03

#3F9FCB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #3F9FCB

7.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9FCB	#FFFFFF	#000000	##000000
##3F9FCB	1.00	2.99	7.03	7.03
#FFFFFF	2.99	1.00	21.00	21.00
#000000	7.03	21.00	1.00	1.00
##000000	7.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#899DCD

Deuteranopia (green-blind)

#768FCA

Tritanopia (blue-blind)

#00ABAE

Achromatopsia (no color)

#959595

Design tokens & code

CSS

--color: #3f9fcb;
/* rgb */ color: rgb(63, 159, 203);
/* oklch */ color: oklch(66.5% 0.110 231.7);

Tailwind

colors: {
  custom: {
    50: '#84bbdb',
    500: '#3f9fcb',
    950: '#000000',
  },
}

SCSS

$custom: #3f9fcb;
$custom-light: #84bbdb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9fcb",
  "rgb": {
    "r": 63,
    "g": 159,
    "b": 203
  },
  "hsl": {
    "h": 198.857,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.66458,
    "c": 0.10987,
    "h": 231.7
  },
  "luminance": 0.30165
}

Semantic roles & 50–950 ramp

primary

#3F9FCB

secondary

#D1A894

accent

#7747E1

background

#F8FBFD

surface

#F0F6FB

border

#CBD0D4

text

#0C1115

muted

#7D8083

Preview Lab

Preview with #3F9FCB

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

Preview Lab → · Contrast checker → · Palette generator →