#3F75D0#3F75D0

#3F75D0 is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.2% C 0.152 H 260.2°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3F75D0
RGB	rgb(63, 117, 208)
HSL	hsl(218, 61%, 53%)
HSV	hsv(218, 70%, 82%)
CMYK	cmyk(69.7%, 43.8%, 0%, 18.4%)
CIE-LAB	lab(49.90, 12.33, -52.30)
CIE-LCH	lch(49.90, 53.73, 283.27°)
OKLab	oklab(57.19% -0.0259 -0.1496)
OKLCH	oklch(57.19% 0.152 260.2)
XYZ	xyz(19.7923, 18.3313, 62.1575)
Luminance	0.1833 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75D0 #D09A3F

analogous

#3FBDD0 #3F75D0 #513FD0

triadic

#3F75D0 #D03F75 #75D03F

tetradic

#3F75D0 #D03FBD #D09A3F #3FD051

square

#3F75D0 #D03FBD #D09A3F #3FD051

split-complementary

#3F75D0 #D0513F #BDD03F

monochromatic

#1D3F77 #2959A9 #3F75D0 #7098DC #A1BCE8

Accessibility & contrast

On white

4.50

#3F75D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#3F75D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F75D0

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75D0	#FFFFFF	#000000	##000000
##3F75D0	1.00	4.50	4.67	4.67
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#487ED3

Deuteranopia (green-blind)

#2E70CE

Tritanopia (blue-blind)

#008A98

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f75d0;
/* rgb */ color: rgb(63, 117, 208);
/* oklch */ color: oklch(57.2% 0.152 260.2);

Tailwind

colors: {
  custom: {
    50: '#859cdf',
    500: '#3f75d0',
    950: '#000000',
  },
}

SCSS

$custom: #3f75d0;
$custom-light: #859cdf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75d0",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 208
  },
  "hsl": {
    "h": 217.655,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.5719,
    "c": 0.15178,
    "h": 260.2
  },
  "luminance": 0.18333
}

Semantic roles & 50–950 ramp

primary

#3F75D0

secondary

#D5BD96

accent

#A844E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F75D0

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

Preview Lab → · Contrast checker → · Palette generator →