#3F81DA#3F81DA

#3F81DA is a mid, vivid cyan. Relative luminance 0.218; OKLCH L 60.4% C 0.152 H 256.7°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#3F81DA
RGB	rgb(63, 129, 218)
HSL	hsl(214, 68%, 55%)
HSV	hsv(214, 71%, 85%)
CMYK	cmyk(71.1%, 40.8%, 0%, 14.5%)
CIE-LAB	lab(53.83, 8.53, -51.67)
CIE-LCH	lch(53.83, 52.37, 279.38°)
OKLab	oklab(60.42% -0.0348 -0.1475)
OKLCH	oklch(60.42% 0.152 256.7)
XYZ	xyz(22.5504, 21.8168, 69.3387)
Luminance	0.2182 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F81DA #DA983F

analogous

#3FCEDA #3F81DA #4B3FDA

triadic

#3F81DA #DA3F81 #81DA3F

tetradic

#3F81DA #DA3FCE #DA983F #3FDA4B

square

#3F81DA #DA3FCE #DA983F #3FDA4B

split-complementary

#3F81DA #DA4B3F #CEDA3F

monochromatic

#1A4785 #2463B8 #3F81DA #72A3E4 #A6C4EE

Accessibility & contrast

On white

3.92

#3F81DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.36

#3F81DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F81DA

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F81DA	#FFFFFF	#000000	##000000
##3F81DA	1.00	3.92	5.36	5.36
#FFFFFF	3.92	1.00	21.00	21.00
#000000	5.36	21.00	1.00	1.00
##000000	5.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5788DE

Deuteranopia (green-blind)

#3D7AD8

Tritanopia (blue-blind)

#0096A3

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #3f81da;
/* rgb */ color: rgb(63, 129, 218);
/* oklch */ color: oklch(60.4% 0.152 256.7);

Tailwind

colors: {
  custom: {
    50: '#86a5e6',
    500: '#3f81da',
    950: '#000000',
  },
}

SCSS

$custom: #3f81da;
$custom-light: #86a5e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f81da",
  "rgb": {
    "r": 63,
    "g": 129,
    "b": 218
  },
  "hsl": {
    "h": 214.452,
    "s": 67.686,
    "l": 55.098
  },
  "oklch": {
    "l": 0.60423,
    "c": 0.15157,
    "h": 256.7
  },
  "luminance": 0.21819
}

Semantic roles & 50–950 ramp

primary

#3F81DA

secondary

#DBBF9A

accent

#A13DEB

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0D0F16

muted

#7D7F84

Preview Lab

Preview with #3F81DA

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

Preview Lab → · Contrast checker → · Palette generator →