#3F308B#3F308B

#3F308B is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.3% C 0.144 H 284.8°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#3F308B
RGB	rgb(63, 48, 139)
HSL	hsl(250, 49%, 37%)
HSV	hsv(250, 65%, 55%)
CMYK	cmyk(54.7%, 65.5%, 0%, 45.5%)
CIE-LAB	lab(26.83, 32.34, -48.59)
CIE-LCH	lch(26.83, 58.37, 303.64°)
OKLab	oklab(38.29% 0.037 -0.1395)
OKLCH	oklch(38.29% 0.144 284.8)
XYZ	xyz(7.7656, 5.0343, 24.9836)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F308B #7C8B30

analogous

#304F8B #3F308B #6D308B

triadic

#3F308B #8B3F30 #308B3F

tetradic

#3F308B #8B304F #7C8B30 #308B6D

square

#3F308B #8B304F #7C8B30 #308B6D

split-complementary

#3F308B #8B6D30 #4F8B30

monochromatic

#161130 #2A205E #3F308B #5440B8 #7A6ACC

Accessibility & contrast

On white

10.46

#3F308B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#3F308B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F308B

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F308B	#FFFFFF	#000000	##FFFFFF
##3F308B	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#1F4659

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #3f308b;
/* rgb */ color: rgb(63, 48, 139);
/* oklch */ color: oklch(38.3% 0.144 284.8);

Tailwind

colors: {
  custom: {
    50: '#7c69ae',
    500: '#3f308b',
    950: '#000000',
  },
}

SCSS

$custom: #3f308b;
$custom-light: #7c69ae;
$custom-dark: #000000;

JSON

{
  "hex": "#3f308b",
  "rgb": {
    "r": 63,
    "g": 48,
    "b": 139
  },
  "hsl": {
    "h": 249.89,
    "s": 48.663,
    "l": 36.667
  },
  "oklch": {
    "l": 0.38293,
    "c": 0.14427,
    "h": 284.8
  },
  "luminance": 0.05035
}

Semantic roles & 50–950 ramp

primary

#3F308B

secondary

#A6B364

accent

#D850C2

background

#F7F6FA

surface

#EEEBF4

border

#C9C6CE

text

#0A0610

muted

#7C7A7F

Preview Lab

Preview with #3F308B

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

Preview Lab → · Contrast checker → · Palette generator →