#3F50D9#3F50D9

#3F50D9 is a mid, highly saturated blue. Relative luminance 0.118; OKLCH L 50.6% C 0.208 H 271.2°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F50D9
RGB	rgb(63, 80, 217)
HSL	hsl(233, 67%, 55%)
HSV	hsv(233, 71%, 85%)
CMYK	cmyk(71%, 63.1%, 0%, 14.9%)
CIE-LAB	lab(40.90, 38.86, -72.00)
CIE-LCH	lch(40.90, 81.82, 298.35°)
OKLab	oklab(50.6% 0.0045 -0.208)
OKLCH	oklch(50.6% 0.208 271.2)
XYZ	xyz(17.4387, 11.8021, 66.9912)
Luminance	0.1180 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50D9 #D9C83F

analogous

#3F9DD9 #3F50D9 #7B3FD9

triadic

#3F50D9 #D93F50 #50D93F

tetradic

#3F50D9 #D93F9D #D9C83F #3FD97B

square

#3F50D9 #D93F9D #D9C83F #3FD97B

split-complementary

#3F50D9 #D97B3F #9DD93F

monochromatic

#1A2684 #2434B7 #3F50D9 #727FE3 #A5ADED

Accessibility & contrast

On white

6.25

#3F50D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#3F50D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F50D9

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50D9	#FFFFFF	#000000	##FFFFFF
##3F50D9	1.00	6.25	3.36	6.25
#FFFFFF	6.25	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068DD

Deuteranopia (green-blind)

#0059D6

Tritanopia (blue-blind)

#00748D

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f50d9;
/* rgb */ color: rgb(63, 80, 217);
/* oklch */ color: oklch(50.6% 0.208 271.2);

Tailwind

colors: {
  custom: {
    50: '#8881e6',
    500: '#3f50d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f50d9;
$custom-light: #8881e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50d9",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 217
  },
  "hsl": {
    "h": 233.377,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.50602,
    "c": 0.20804,
    "h": 271.2
  },
  "luminance": 0.11804
}

Semantic roles & 50–950 ramp

primary

#3F50D9

secondary

#DAD39A

accent

#D73EEA

background

#F9F7FE

surface

#F1EEFC

border

#CBC9D5

text

#0D0A16

muted

#7E7C84

Preview Lab

Preview with #3F50D9

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

Preview Lab → · Contrast checker → · Palette generator →