#3F488C#3F488C

#3F488C is a dark, moderate blue. Relative luminance 0.076; OKLCH L 43.0% C 0.112 H 275.0°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#3F488C
RGB	rgb(63, 72, 140)
HSL	hsl(233, 38%, 40%)
HSV	hsv(233, 55%, 55%)
CMYK	cmyk(55%, 48.6%, 0%, 45.1%)
CIE-LAB	lab(33.10, 17.09, -39.09)
CIE-LCH	lch(33.10, 42.66, 293.61°)
OKLab	oklab(42.98% 0.0098 -0.1113)
OKLCH	oklch(42.98% 0.112 275)
XYZ	xyz(9.0994, 7.5843, 25.7903)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F488C #8C833F

analogous

#3F6F8C #3F488C #5D3F8C

triadic

#3F488C #8C3F48 #488C3F

tetradic

#3F488C #8C3F6F #8C833F #3F8C5D

square

#3F488C #8C3F6F #8C833F #3F8C5D

split-complementary

#3F488C #8C5D3F #6F8C3F

monochromatic

#191D38 #2C3262 #3F488C #5560B3 #8088C6

Accessibility & contrast

On white

8.34

#3F488C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#3F488C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F488C

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F488C	#FFFFFF	#000000	##FFFFFF
##3F488C	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29518E

Deuteranopia (green-blind)

#204B8B

Tritanopia (blue-blind)

#1A5763

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f488c;
/* rgb */ color: rgb(63, 72, 140);
/* oklch */ color: oklch(43.0% 0.112 275.0);

Tailwind

colors: {
  custom: {
    50: '#7a7aae',
    500: '#3f488c',
    950: '#000000',
  },
}

SCSS

$custom: #3f488c;
$custom-light: #7a7aae;
$custom-dark: #000000;

JSON

{
  "hex": "#3f488c",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 140
  },
  "hsl": {
    "h": 232.987,
    "s": 37.931,
    "l": 39.804
  },
  "oklch": {
    "l": 0.42979,
    "c": 0.11178,
    "h": 275
  },
  "luminance": 0.07585
}

Semantic roles & 50–950 ramp

primary

#3F488C

secondary

#B0A977

accent

#C05ACE

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F488C

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

Preview Lab → · Contrast checker → · Palette generator →