#3F5FD9#3F5FD9

#3F5FD9 is a mid, vivid blue. Relative luminance 0.143; OKLCH L 53.3% C 0.190 H 268.1°. Best body text is #FFFFFF at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#3F5FD9
RGB	rgb(63, 95, 217)
HSL	hsl(228, 67%, 55%)
HSV	hsv(228, 71%, 85%)
CMYK	cmyk(71%, 56.2%, 0%, 14.9%)
CIE-LAB	lab(44.59, 29.46, -65.99)
CIE-LCH	lch(44.59, 72.26, 294.06°)
OKLab	oklab(53.34% -0.0062 -0.1902)
OKLCH	oklch(53.34% 0.19 268.1)
XYZ	xyz(18.6622, 14.2490, 67.3990)
Luminance	0.1425 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5FD9 #D9B93F

analogous

#3FACD9 #3F5FD9 #6C3FD9

triadic

#3F5FD9 #D93F5F #5FD93F

tetradic

#3F5FD9 #D93FAC #D9B93F #3FD96C

square

#3F5FD9 #D93FAC #D9B93F #3FD96C

split-complementary

#3F5FD9 #D96C3F #ACD93F

monochromatic

#1A3084 #2443B7 #3F5FD9 #728AE3 #A5B4ED

Accessibility & contrast

On white

5.45

#3F5FD9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.85

#3F5FD9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5FD9

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5FD9	#FFFFFF	#000000	##FFFFFF
##3F5FD9	1.00	5.45	3.85	5.45
#FFFFFF	5.45	1.00	21.00	1.00
#000000	3.85	21.00	1.00	21.00
##FFFFFF	5.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0071DD

Deuteranopia (green-blind)

#0063D7

Tritanopia (blue-blind)

#007D93

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3f5fd9;
/* rgb */ color: rgb(63, 95, 217);
/* oklch */ color: oklch(53.3% 0.190 268.1);

Tailwind

colors: {
  custom: {
    50: '#878ce6',
    500: '#3f5fd9',
    950: '#000000',
  },
}

SCSS

$custom: #3f5fd9;
$custom-light: #878ce6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5fd9",
  "rgb": {
    "r": 63,
    "g": 95,
    "b": 217
  },
  "hsl": {
    "h": 227.532,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.5334,
    "c": 0.19027,
    "h": 268.1
  },
  "luminance": 0.14251
}

Semantic roles & 50–950 ramp

primary

#3F5FD9

secondary

#DACD9A

accent

#C63EEA

background

#F9F8FE

surface

#F1F0FC

border

#CBCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #3F5FD9

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

Preview Lab → · Contrast checker → · Palette generator →