#3F488F#3F488F

#3F488F is a dark, moderate blue. Relative luminance 0.077; OKLCH L 43.2% C 0.116 H 275.0°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#3F488F
RGB	rgb(63, 72, 143)
HSL	hsl(233, 39%, 40%)
HSV	hsv(233, 56%, 56%)
CMYK	cmyk(55.9%, 49.7%, 0%, 43.9%)
CIE-LAB	lab(33.29, 18.12, -40.62)
CIE-LCH	lch(33.29, 44.47, 294.04°)
OKLab	oklab(43.19% 0.0102 -0.1158)
OKLCH	oklch(43.19% 0.116 275)
XYZ	xyz(9.3236, 7.6740, 26.9712)
Luminance	0.0767 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F488F #8F863F

analogous

#3F708F #3F488F #5E3F8F

triadic

#3F488F #8F3F48 #488F3F

tetradic

#3F488F #8F3F70 #8F863F #3F8F5E

square

#3F488F #8F3F70 #8F863F #3F8F5E

split-complementary

#3F488F #8F5E3F #708F3F

monochromatic

#1A1D3A #2C3365 #3F488F #5661B5 #8189C7

Accessibility & contrast

On white

8.28

#3F488F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#3F488F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F488F

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F488F	#FFFFFF	#000000	##FFFFFF
##3F488F	1.00	8.28	2.53	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#265292

Deuteranopia (green-blind)

#1C4B8D

Tritanopia (blue-blind)

#175864

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f488f;
/* rgb */ color: rgb(63, 72, 143);
/* oklch */ color: oklch(43.2% 0.116 275.0);

Tailwind

colors: {
  custom: {
    50: '#7b7ab0',
    500: '#3f488f',
    950: '#000000',
  },
}

SCSS

$custom: #3f488f;
$custom-light: #7b7ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f488f",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 143
  },
  "hsl": {
    "h": 233.25,
    "s": 38.835,
    "l": 40.392
  },
  "oklch": {
    "l": 0.43188,
    "c": 0.11628,
    "h": 275
  },
  "luminance": 0.07675
}

Semantic roles & 50–950 ramp

primary

#3F488F

secondary

#B2AB78

accent

#C259CF

background

#F7F7FA

surface

#EEEDF5

border

#C9C8CF

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F488F

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

Preview Lab → · Contrast checker → · Palette generator →