#3F458D#3F458D

#3F458D is a dark, moderate blue. Relative luminance 0.072; OKLCH L 42.4% C 0.118 H 276.6°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#3F458D
RGB	rgb(63, 69, 141)
HSL	hsl(235, 38%, 40%)
HSV	hsv(235, 55%, 55%)
CMYK	cmyk(55.3%, 51.1%, 0%, 44.7%)
CIE-LAB	lab(32.34, 19.41, -40.93)
CIE-LCH	lch(32.34, 45.30, 295.38°)
OKLab	oklab(42.42% 0.0135 -0.1168)
OKLCH	oklch(42.42% 0.118 276.6)
XYZ	xyz(8.9842, 7.2355, 26.1173)
Luminance	0.0724 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F458D #8D873F

analogous

#3F6C8D #3F458D #603F8D

triadic

#3F458D #8D3F45 #458D3F

tetradic

#3F458D #8D3F6C #8D873F #3F8D60

square

#3F458D #8D3F6C #8D873F #3F8D60

split-complementary

#3F458D #8D603F #6C8D3F

monochromatic

#191C38 #2C3063 #3F458D #565DB3 #8085C6

Accessibility & contrast

On white

8.58

#3F458D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#3F458D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F458D

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F458D	#FFFFFF	#000000	##FFFFFF
##3F458D	1.00	8.58	2.45	8.58
#FFFFFF	8.58	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224F90

Deuteranopia (green-blind)

#17498B

Tritanopia (blue-blind)

#1A5562

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f458d;
/* rgb */ color: rgb(63, 69, 141);
/* oklch */ color: oklch(42.4% 0.118 276.6);

Tailwind

colors: {
  custom: {
    50: '#7a78af',
    500: '#3f458d',
    950: '#000000',
  },
}

SCSS

$custom: #3f458d;
$custom-light: #7a78af;
$custom-dark: #000000;

JSON

{
  "hex": "#3f458d",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 141
  },
  "hsl": {
    "h": 235.385,
    "s": 38.235,
    "l": 40
  },
  "oklch": {
    "l": 0.42422,
    "c": 0.11755,
    "h": 276.6
  },
  "luminance": 0.07236
}

Semantic roles & 50–950 ramp

primary

#3F458D

secondary

#B1AC77

accent

#C55ACE

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F458D

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

Preview Lab → · Contrast checker → · Palette generator →