#3F7BCB#3F7BCB

#3F7BCB is a mid, vivid cyan. Relative luminance 0.195; OKLCH L 58.2% C 0.138 H 256.4°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BCB
RGB	rgb(63, 123, 203)
HSL	hsl(214, 57%, 52%)
HSV	hsv(214, 69%, 80%)
CMYK	cmyk(69%, 39.4%, 0%, 20.4%)
CIE-LAB	lab(51.30, 6.84, -47.20)
CIE-LCH	lch(51.30, 47.70, 278.24°)
OKLab	oklab(58.19% -0.0325 -0.1345)
OKLCH	oklch(58.19% 0.138 256.4)
XYZ	xyz(19.9084, 19.5324, 59.2093)
Luminance	0.1953 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BCB #CB8F3F

analogous

#3FC1CB #3F7BCB #493FCB

triadic

#3F7BCB #CB3F7B #7BCB3F

tetradic

#3F7BCB #CB3FC1 #CB8F3F #3FCB49

square

#3F7BCB #CB3FC1 #CB8F3F #3FCB49

split-complementary

#3F7BCB #CB493F #C1CB3F

monochromatic

#1F4271 #2C5EA1 #3F7BCB #6F9CD8 #9FBDE5

Accessibility & contrast

On white

4.28

#3F7BCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#3F7BCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BCB

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BCB	#FFFFFF	#000000	##000000
##3F7BCB	1.00	4.28	4.91	4.91
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5681CE

Deuteranopia (green-blind)

#4174C9

Tritanopia (blue-blind)

#008E99

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f7bcb;
/* rgb */ color: rgb(63, 123, 203);
/* oklch */ color: oklch(58.2% 0.138 256.4);

Tailwind

colors: {
  custom: {
    50: '#83a0db',
    500: '#3f7bcb',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bcb;
$custom-light: #83a0db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bcb",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 203
  },
  "hsl": {
    "h": 214.286,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.58189,
    "c": 0.13839,
    "h": 256.4
  },
  "luminance": 0.19534
}

Semantic roles & 50–950 ramp

primary

#3F7BCB

secondary

#D1B794

accent

#9F47E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F7BCB

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

Preview Lab → · Contrast checker → · Palette generator →