#3F81E2#3F81E2

#3F81E2 is a mid, vivid blue. Relative luminance 0.222; OKLCH L 60.9% C 0.162 H 258.2°. Best body text is #000000 at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#3F81E2
RGB	rgb(63, 129, 226)
HSL	hsl(216, 74%, 57%)
HSV	hsv(216, 72%, 89%)
CMYK	cmyk(72.1%, 42.9%, 0%, 11.4%)
CIE-LAB	lab(54.29, 11.40, -55.43)
CIE-LCH	lch(54.29, 56.60, 281.62°)
OKLab	oklab(60.92% -0.0332 -0.1586)
OKLCH	oklch(60.92% 0.162 258.2)
XYZ	xyz(23.6226, 22.2457, 74.9856)
Luminance	0.2225 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F81E2 #E2A03F

analogous

#3FD2E2 #3F81E2 #4F3FE2

triadic

#3F81E2 #E23F81 #81E23F

tetradic

#3F81E2 #E23FD2 #E2A03F #3FE24F

square

#3F81E2 #E23FD2 #E2A03F #3FE24F

split-complementary

#3F81E2 #E24F3F #D2E23F

monochromatic

#164891 #1E62C6 #3F81E2 #74A4EA #A9C7F2

Accessibility & contrast

On white

3.85

#3F81E2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.45

#3F81E2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F81E2

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F81E2	#FFFFFF	#000000	##000000
##3F81E2	1.00	3.85	5.45	5.45
#FFFFFF	3.85	1.00	21.00	21.00
#000000	5.45	21.00	1.00	1.00
##000000	5.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#518AE6

Deuteranopia (green-blind)

#347BE0

Tritanopia (blue-blind)

#0098A6

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #3f81e2;
/* rgb */ color: rgb(63, 129, 226);
/* oklch */ color: oklch(60.9% 0.162 258.2);

Tailwind

colors: {
  custom: {
    50: '#88a5ec',
    500: '#3f81e2',
    950: '#000000',
  },
}

SCSS

$custom: #3f81e2;
$custom-light: #88a5ec;
$custom-dark: #000000;

JSON

{
  "hex": "#3f81e2",
  "rgb": {
    "r": 63,
    "g": 129,
    "b": 226
  },
  "hsl": {
    "h": 215.706,
    "s": 73.756,
    "l": 56.667
  },
  "oklch": {
    "l": 0.60923,
    "c": 0.16202,
    "h": 258.2
  },
  "luminance": 0.22248
}

Semantic roles & 50–950 ramp

primary

#3F81E2

secondary

#E0C59D

accent

#A537F0

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #3F81E2

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

Preview Lab → · Contrast checker → · Palette generator →