#3F81D5#3F81D5

#3F81D5 is a mid, vivid cyan. Relative luminance 0.216; OKLCH L 60.1% C 0.145 H 255.7°. Best body text is #000000 at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#3F81D5
RGB	rgb(63, 129, 213)
HSL	hsl(214, 64%, 54%)
HSV	hsv(214, 70%, 84%)
CMYK	cmyk(70.4%, 39.4%, 0%, 16.5%)
CIE-LAB	lab(53.56, 6.75, -49.29)
CIE-LCH	lch(53.56, 49.75, 277.79°)
OKLab	oklab(60.12% -0.0359 -0.1405)
OKLCH	oklch(60.12% 0.145 255.7)
XYZ	xyz(21.9060, 21.5590, 65.9447)
Luminance	0.2156 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F81D5 #D5933F

analogous

#3FCCD5 #3F81D5 #483FD5

triadic

#3F81D5 #D53F81 #81D53F

tetradic

#3F81D5 #D53FCC #D5933F #3FD548

square

#3F81D5 #D53FCC #D5933F #3FD548

split-complementary

#3F81D5 #D5483F #CCD53F

monochromatic

#1C477E #2763B0 #3F81D5 #71A2E0 #A3C3EB

Accessibility & contrast

On white

3.95

#3F81D5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.31

#3F81D5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F81D5

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F81D5	#FFFFFF	#000000	##000000
##3F81D5	1.00	3.95	5.31	5.31
#FFFFFF	3.95	1.00	21.00	21.00
#000000	5.31	21.00	1.00	1.00
##000000	5.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A88D8

Deuteranopia (green-blind)

#437AD3

Tritanopia (blue-blind)

#0095A1

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3f81d5;
/* rgb */ color: rgb(63, 129, 213);
/* oklch */ color: oklch(60.1% 0.145 255.7);

Tailwind

colors: {
  custom: {
    50: '#85a5e2',
    500: '#3f81d5',
    950: '#000000',
  },
}

SCSS

$custom: #3f81d5;
$custom-light: #85a5e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f81d5",
  "rgb": {
    "r": 63,
    "g": 129,
    "b": 213
  },
  "hsl": {
    "h": 213.6,
    "s": 64.103,
    "l": 54.118
  },
  "oklch": {
    "l": 0.60119,
    "c": 0.14506,
    "h": 255.7
  },
  "luminance": 0.21561
}

Semantic roles & 50–950 ramp

primary

#3F81D5

secondary

#D8BC98

accent

#9E41E7

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3F81D5

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

Preview Lab → · Contrast checker → · Palette generator →