#3F458F#3F458F

#3F458F is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.6% C 0.121 H 276.5°. Best body text is #FFFFFF at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#3F458F
RGB	rgb(63, 69, 143)
HSL	hsl(236, 39%, 40%)
HSV	hsv(236, 56%, 56%)
CMYK	cmyk(55.9%, 51.7%, 0%, 43.9%)
CIE-LAB	lab(32.47, 20.10, -41.94)
CIE-LCH	lch(32.47, 46.51, 295.61°)
OKLab	oklab(42.57% 0.0137 -0.1197)
OKLCH	oklch(42.57% 0.121 276.5)
XYZ	xyz(9.1344, 7.2956, 26.9081)
Luminance	0.0730 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F458F #8F893F

analogous

#3F6D8F #3F458F #613F8F

triadic

#3F458F #8F3F45 #458F3F

tetradic

#3F458F #8F3F6D #8F893F #3F8F61

square

#3F458F #8F3F6D #8F893F #3F8F61

split-complementary

#3F458F #8F613F #6D8F3F

monochromatic

#1A1C3A #2C3165 #3F458F #565EB5 #8186C7

Accessibility & contrast

On white

8.54

#3F458F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#3F458F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F458F

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F458F	#FFFFFF	#000000	##FFFFFF
##3F458F	1.00	8.54	2.46	8.54
#FFFFFF	8.54	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F5092

Deuteranopia (green-blind)

#14498D

Tritanopia (blue-blind)

#175663

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f458f;
/* rgb */ color: rgb(63, 69, 143);
/* oklch */ color: oklch(42.6% 0.121 276.5);

Tailwind

colors: {
  custom: {
    50: '#7b78b0',
    500: '#3f458f',
    950: '#000000',
  },
}

SCSS

$custom: #3f458f;
$custom-light: #7b78b0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f458f",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 143
  },
  "hsl": {
    "h": 235.5,
    "s": 38.835,
    "l": 40.392
  },
  "oklch": {
    "l": 0.42565,
    "c": 0.12053,
    "h": 276.5
  },
  "luminance": 0.07296
}

Semantic roles & 50–950 ramp

primary

#3F458F

secondary

#B2AD78

accent

#C659CF

background

#F7F7FA

surface

#EEEDF5

border

#C9C8CF

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F458F

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

Preview Lab → · Contrast checker → · Palette generator →