#3F73B2#3F73B2

#3F73B2 is a mid, moderate cyan. Relative luminance 0.165; OKLCH L 54.9% C 0.114 H 254.4°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3F73B2
RGB	rgb(63, 115, 178)
HSL	hsl(213, 48%, 47%)
HSV	hsv(213, 65%, 70%)
CMYK	cmyk(64.6%, 35.4%, 0%, 30.2%)
CIE-LAB	lab(47.66, 2.89, -38.60)
CIE-LCH	lch(47.66, 38.71, 274.28°)
OKLab	oklab(54.92% -0.0306 -0.1094)
OKLCH	oklch(54.92% 0.114 254.4)
XYZ	xyz(16.2136, 16.5310, 44.4472)
Luminance	0.1653 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73B2 #B27E3F

analogous

#3FACB2 #3F73B2 #453FB2

triadic

#3F73B2 #B23F73 #73B23F

tetradic

#3F73B2 #B23FAC #B27E3F #3FB245

square

#3F73B2 #B23FAC #B27E3F #3FB245

split-complementary

#3F73B2 #B2453F #ACB23F

monochromatic

#1F3958 #2F5685 #3F73B2 #6692C9 #93B2D9

Accessibility & contrast

On white

4.88

#3F73B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#3F73B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F73B2

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73B2	#FFFFFF	#000000	##FFFFFF
##3F73B2	1.00	4.88	4.31	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5877B5

Deuteranopia (green-blind)

#486CB1

Tritanopia (blue-blind)

#00828A

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3f73b2;
/* rgb */ color: rgb(63, 115, 178);
/* oklch */ color: oklch(54.9% 0.114 254.4);

Tailwind

colors: {
  custom: {
    50: '#7f9ac9',
    500: '#3f73b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f73b2;
$custom-light: #7f9ac9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73b2",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 178
  },
  "hsl": {
    "h": 212.87,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.54917,
    "c": 0.11363,
    "h": 254.4
  },
  "luminance": 0.16533
}

Semantic roles & 50–950 ramp

primary

#3F73B2

secondary

#C4A989

accent

#9A50D7

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F73B2

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

Preview Lab → · Contrast checker → · Palette generator →