#3F45A2#3F45A2

#3F45A2 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.0% C 0.148 H 275.7°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#3F45A2
RGB	rgb(63, 69, 162)
HSL	hsl(236, 44%, 44%)
HSV	hsv(236, 61%, 64%)
CMYK	cmyk(61.1%, 57.4%, 0%, 36.5%)
CIE-LAB	lab(33.82, 26.68, -51.30)
CIE-LCH	lch(33.82, 57.82, 297.48°)
OKLab	oklab(44% 0.0147 -0.1473)
OKLCH	oklch(44% 0.148 275.7)
XYZ	xyz(10.6975, 7.9208, 35.1406)
Luminance	0.0792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F45A2 #A29C3F

analogous

#3F77A2 #3F45A2 #6B3FA2

triadic

#3F45A2 #A23F45 #45A23F

tetradic

#3F45A2 #A23F77 #A29C3F #3FA26B

square

#3F45A2 #A23F77 #A29C3F #3FA26B

split-complementary

#3F45A2 #A26B3F #77A23F

monochromatic

#1D1F4A #2E3276 #3F45A2 #5E64C0 #8A8ED1

Accessibility & contrast

On white

8.13

#3F45A2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3F45A2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45A2

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45A2	#FFFFFF	#000000	##FFFFFF
##3F45A2	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054A5

Deuteranopia (green-blind)

#004BA0

Tritanopia (blue-blind)

#005B6C

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3f45a2;
/* rgb */ color: rgb(63, 69, 162);
/* oklch */ color: oklch(44.0% 0.148 275.7);

Tailwind

colors: {
  custom: {
    50: '#7e78be',
    500: '#3f45a2',
    950: '#000000',
  },
}

SCSS

$custom: #3f45a2;
$custom-light: #7e78be;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45a2",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 162
  },
  "hsl": {
    "h": 236.364,
    "s": 44,
    "l": 44.118
  },
  "oklch": {
    "l": 0.44003,
    "c": 0.14801,
    "h": 275.7
  },
  "luminance": 0.07922
}

Semantic roles & 50–950 ramp

primary

#3F45A2

secondary

#BCB981

accent

#CC54D4

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0912

muted

#7C7B81

Preview Lab

Preview with #3F45A2

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

Preview Lab → · Contrast checker → · Palette generator →