#3F488D#3F488D

#3F488D is a dark, moderate blue. Relative luminance 0.076; OKLCH L 43.0% C 0.113 H 275.0°. Best body text is #FFFFFF at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#3F488D
RGB	rgb(63, 72, 141)
HSL	hsl(233, 38%, 40%)
HSV	hsv(233, 55%, 55%)
CMYK	cmyk(55.3%, 48.9%, 0%, 44.7%)
CIE-LAB	lab(33.17, 17.43, -39.60)
CIE-LCH	lch(33.17, 43.26, 293.76°)
OKLab	oklab(43.05% 0.0099 -0.1128)
OKLCH	oklch(43.05% 0.113 275)
XYZ	xyz(9.1734, 7.6140, 26.1804)
Luminance	0.0761 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F488D #8D843F

analogous

#3F6F8D #3F488D #5D3F8D

triadic

#3F488D #8D3F48 #488D3F

tetradic

#3F488D #8D3F6F #8D843F #3F8D5D

square

#3F488D #8D3F6F #8D843F #3F8D5D

split-complementary

#3F488D #8D5D3F #6F8D3F

monochromatic

#191D38 #2C3263 #3F488D #5661B3 #8088C6

Accessibility & contrast

On white

8.32

#3F488D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#3F488D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F488D

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F488D	#FFFFFF	#000000	##FFFFFF
##3F488D	1.00	8.32	2.52	8.32
#FFFFFF	8.32	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#285190

Deuteranopia (green-blind)

#1E4B8C

Tritanopia (blue-blind)

#195763

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f488d;
/* rgb */ color: rgb(63, 72, 141);
/* oklch */ color: oklch(43.0% 0.113 275.0);

Tailwind

colors: {
  custom: {
    50: '#7a7aaf',
    500: '#3f488d',
    950: '#000000',
  },
}

SCSS

$custom: #3f488d;
$custom-light: #7a7aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f488d",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 141
  },
  "hsl": {
    "h": 233.077,
    "s": 38.235,
    "l": 40
  },
  "oklch": {
    "l": 0.43048,
    "c": 0.11328,
    "h": 275
  },
  "luminance": 0.07615
}

Semantic roles & 50–950 ramp

primary

#3F488D

secondary

#B1AA77

accent

#C15ACE

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F488D

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

Preview Lab → · Contrast checker → · Palette generator →