#3F4FA8#3F4FA8

#3F4FA8 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.4% C 0.143 H 272.0°. Best body text is #FFFFFF at 7.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F4FA8
RGB	rgb(63, 79, 168)
HSL	hsl(231, 45%, 45%)
HSV	hsv(231, 63%, 66%)
CMYK	cmyk(62.5%, 53%, 0%, 34.1%)
CIE-LAB	lab(36.88, 22.27, -49.93)
CIE-LCH	lch(36.88, 54.67, 294.04°)
OKLab	oklab(46.44% 0.005 -0.1431)
OKLCH	oklch(46.44% 0.143 272)
XYZ	xyz(11.9114, 9.4749, 38.2393)
Luminance	0.0948 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4FA8 #A8983F

analogous

#3F84A8 #3F4FA8 #633FA8

triadic

#3F4FA8 #A83F4F #4FA83F

tetradic

#3F4FA8 #A83F84 #A8983F #3FA863

square

#3F4FA8 #A83F84 #A8983F #3FA863

split-complementary

#3F4FA8 #A8633F #84A83F

monochromatic

#1E254F #2E3A7B #3F4FA8 #6170C4 #8D98D4

Accessibility & contrast

On white

7.25

#3F4FA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#3F4FA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4FA8

7.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4FA8	#FFFFFF	#000000	##FFFFFF
##3F4FA8	1.00	7.25	2.90	7.25
#FFFFFF	7.25	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#195CAB

Deuteranopia (green-blind)

#0052A6

Tritanopia (blue-blind)

#006474

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f4fa8;
/* rgb */ color: rgb(63, 79, 168);
/* oklch */ color: oklch(46.4% 0.143 272.0);

Tailwind

colors: {
  custom: {
    50: '#7f80c2',
    500: '#3f4fa8',
    950: '#000000',
  },
}

SCSS

$custom: #3f4fa8;
$custom-light: #7f80c2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4fa8",
  "rgb": {
    "r": 63,
    "g": 79,
    "b": 168
  },
  "hsl": {
    "h": 230.857,
    "s": 45.455,
    "l": 45.294
  },
  "oklch": {
    "l": 0.46436,
    "c": 0.14324,
    "h": 272
  },
  "luminance": 0.09476
}

Semantic roles & 50–950 ramp

primary

#3F4FA8

secondary

#BFB684

accent

#C153D5

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A12

muted

#7C7C81

Preview Lab

Preview with #3F4FA8

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

Preview Lab → · Contrast checker → · Palette generator →