#3F488A#3F488A

#3F488A is a dark, moderate blue. Relative luminance 0.075; OKLCH L 42.8% C 0.109 H 275.0°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#3F488A
RGB	rgb(63, 72, 138)
HSL	hsl(233, 37%, 39%)
HSV	hsv(233, 54%, 54%)
CMYK	cmyk(54.3%, 47.8%, 0%, 45.9%)
CIE-LAB	lab(32.98, 16.40, -38.06)
CIE-LCH	lch(32.98, 41.44, 293.31°)
OKLab	oklab(42.84% 0.0095 -0.1083)
OKLCH	oklch(42.84% 0.109 275)
XYZ	xyz(8.9532, 7.5259, 25.0207)
Luminance	0.0753 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F488A #8A813F

analogous

#3F6E8A #3F488A #5C3F8A

triadic

#3F488A #8A3F48 #488A3F

tetradic

#3F488A #8A3F6E #8A813F #3F8A5C

square

#3F488A #8A3F6E #8A813F #3F8A5C

split-complementary

#3F488A #8A5C3F #6E8A3F

monochromatic

#191C36 #2C3260 #3F488A #5560B1 #7F87C5

Accessibility & contrast

On white

8.38

#3F488A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3F488A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F488A

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F488A	#FFFFFF	#000000	##FFFFFF
##3F488A	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B518C

Deuteranopia (green-blind)

#224B89

Tritanopia (blue-blind)

#1D5662

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f488a;
/* rgb */ color: rgb(63, 72, 138);
/* oklch */ color: oklch(42.8% 0.109 275.0);

Tailwind

colors: {
  custom: {
    50: '#7a7aac',
    500: '#3f488a',
    950: '#000000',
  },
}

SCSS

$custom: #3f488a;
$custom-light: #7a7aac;
$custom-dark: #000000;

JSON

{
  "hex": "#3f488a",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 138
  },
  "hsl": {
    "h": 232.8,
    "s": 37.313,
    "l": 39.412
  },
  "oklch": {
    "l": 0.42843,
    "c": 0.10874,
    "h": 275
  },
  "luminance": 0.07526
}

Semantic roles & 50–950 ramp

primary

#3F488A

secondary

#AFA876

accent

#C05BCD

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F488A

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

Preview Lab → · Contrast checker → · Palette generator →