#3F75C4#3F75C4

#3F75C4 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.4% C 0.136 H 258.0°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F75C4
RGB	rgb(63, 117, 196)
HSL	hsl(216, 53%, 51%)
HSV	hsv(216, 68%, 77%)
CMYK	cmyk(67.9%, 40.3%, 0%, 23.1%)
CIE-LAB	lab(49.21, 8.03, -46.54)
CIE-LCH	lch(49.21, 47.23, 279.79°)
OKLab	oklab(56.44% -0.0283 -0.1326)
OKLCH	oklch(56.44% 0.136 258)
XYZ	xyz(18.3714, 17.7630, 54.6743)
Luminance	0.1777 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F75C4 #C48E3F

analogous

#3FB7C4 #3F75C4 #4B3FC4

triadic

#3F75C4 #C43F75 #75C43F

tetradic

#3F75C4 #C43FB7 #C48E3F #3FC44B

square

#3F75C4 #C43FB7 #C48E3F #3FC44B

split-complementary

#3F75C4 #C44B3F #B7C43F

monochromatic

#203D68 #2E5997 #3F75C4 #6E97D2 #9DB8E1

Accessibility & contrast

On white

4.61

#3F75C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#3F75C4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F75C4

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F75C4	#FFFFFF	#000000	##FFFFFF
##3F75C4	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#517CC7

Deuteranopia (green-blind)

#3C6FC2

Tritanopia (blue-blind)

#008793

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f75c4;
/* rgb */ color: rgb(63, 117, 196);
/* oklch */ color: oklch(56.4% 0.136 258.0);

Tailwind

colors: {
  custom: {
    50: '#829cd6',
    500: '#3f75c4',
    950: '#000000',
  },
}

SCSS

$custom: #3f75c4;
$custom-light: #829cd6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f75c4",
  "rgb": {
    "r": 63,
    "g": 117,
    "b": 196
  },
  "hsl": {
    "h": 215.639,
    "s": 52.988,
    "l": 50.784
  },
  "oklch": {
    "l": 0.56435,
    "c": 0.13563,
    "h": 258
  },
  "luminance": 0.17765
}

Semantic roles & 50–950 ramp

primary

#3F75C4

secondary

#CDB592

accent

#A24BDC

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3F75C4

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

Preview Lab → · Contrast checker → · Palette generator →