#3F438D#3F438D

#3F438D is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.0% C 0.120 H 277.5°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F438D
RGB	rgb(63, 67, 141)
HSL	hsl(237, 38%, 40%)
HSV	hsv(237, 55%, 55%)
CMYK	cmyk(55.3%, 52.5%, 0%, 44.7%)
CIE-LAB	lab(31.79, 20.74, -41.80)
CIE-LCH	lch(31.79, 46.66, 296.38°)
OKLab	oklab(42.01% 0.0158 -0.1194)
OKLCH	oklch(42.01% 0.12 277.5)
XYZ	xyz(8.8633, 6.9936, 26.0770)
Luminance	0.0699 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F438D #8D893F

analogous

#3F6A8D #3F438D #623F8D

triadic

#3F438D #8D3F43 #438D3F

tetradic

#3F438D #8D3F6A #8D893F #3F8D62

square

#3F438D #8D3F6A #8D893F #3F8D62

split-complementary

#3F438D #8D623F #6A8D3F

monochromatic

#191B38 #2C2F63 #3F438D #565BB3 #8084C6

Accessibility & contrast

On white

8.75

#3F438D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3F438D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F438D

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F438D	#FFFFFF	#000000	##FFFFFF
##3F438D	1.00	8.75	2.40	8.75
#FFFFFF	8.75	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4E90

Deuteranopia (green-blind)

#12488B

Tritanopia (blue-blind)

#1A5461

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3f438d;
/* rgb */ color: rgb(63, 67, 141);
/* oklch */ color: oklch(42.0% 0.120 277.5);

Tailwind

colors: {
  custom: {
    50: '#7b77af',
    500: '#3f438d',
    950: '#000000',
  },
}

SCSS

$custom: #3f438d;
$custom-light: #7b77af;
$custom-dark: #000000;

JSON

{
  "hex": "#3f438d",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 141
  },
  "hsl": {
    "h": 236.923,
    "s": 38.235,
    "l": 40
  },
  "oklch": {
    "l": 0.42011,
    "c": 0.12041,
    "h": 277.5
  },
  "luminance": 0.06994
}

Semantic roles & 50–950 ramp

primary

#3F438D

secondary

#B1AE77

accent

#C85ACE

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0810

muted

#7C7B7F

Preview Lab

Preview with #3F438D

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

Preview Lab → · Contrast checker → · Palette generator →