#3F458E#3F458E

#3F458E is a dark, moderate blue. Relative luminance 0.073; OKLCH L 42.5% C 0.119 H 276.5°. Best body text is #FFFFFF at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#3F458E
RGB	rgb(63, 69, 142)
HSL	hsl(235, 39%, 40%)
HSV	hsv(235, 56%, 56%)
CMYK	cmyk(55.6%, 51.4%, 0%, 44.3%)
CIE-LAB	lab(32.40, 19.76, -41.43)
CIE-LCH	lch(32.40, 45.90, 295.49°)
OKLab	oklab(42.49% 0.0136 -0.1183)
OKLCH	oklch(42.49% 0.119 276.5)
XYZ	xyz(9.0590, 7.2654, 26.5109)
Luminance	0.0727 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F458E #8E883F

analogous

#3F6C8E #3F458E #603F8E

triadic

#3F458E #8E3F45 #458E3F

tetradic

#3F458E #8E3F6C #8E883F #3F8E60

square

#3F458E #8E3F6C #8E883F #3F8E60

split-complementary

#3F458E #8E603F #6C8E3F

monochromatic

#191C39 #2C3064 #3F458E #565DB4 #8186C7

Accessibility & contrast

On white

8.56

#3F458E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#3F458E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F458E

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F458E	#FFFFFF	#000000	##FFFFFF
##3F458E	1.00	8.56	2.45	8.56
#FFFFFF	8.56	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#205091

Deuteranopia (green-blind)

#16498C

Tritanopia (blue-blind)

#195563

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f458e;
/* rgb */ color: rgb(63, 69, 142);
/* oklch */ color: oklch(42.5% 0.119 276.5);

Tailwind

colors: {
  custom: {
    50: '#7b78af',
    500: '#3f458e',
    950: '#000000',
  },
}

SCSS

$custom: #3f458e;
$custom-light: #7b78af;
$custom-dark: #000000;

JSON

{
  "hex": "#3f458e",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 142
  },
  "hsl": {
    "h": 235.443,
    "s": 38.537,
    "l": 40.196
  },
  "oklch": {
    "l": 0.42493,
    "c": 0.11904,
    "h": 276.5
  },
  "luminance": 0.07266
}

Semantic roles & 50–950 ramp

primary

#3F458E

secondary

#B1AD78

accent

#C659CE

background

#F7F7FA

surface

#EEEDF5

border

#C9C8CF

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F458E

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

Preview Lab → · Contrast checker → · Palette generator →