#3F48A3#3F48A3

#3F48A3 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.7% C 0.145 H 274.6°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#3F48A3
RGB	rgb(63, 72, 163)
HSL	hsl(235, 44%, 44%)
HSV	hsv(235, 61%, 64%)
CMYK	cmyk(61.3%, 55.8%, 0%, 36.1%)
CIE-LAB	lab(34.67, 25.08, -50.51)
CIE-LCH	lch(34.67, 56.39, 296.40°)
OKLab	oklab(44.66% 0.0117 -0.1449)
OKLCH	oklch(44.66% 0.145 274.6)
XYZ	xyz(10.9760, 8.3350, 35.6736)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F48A3 #A39A3F

analogous

#3F7AA3 #3F48A3 #683FA3

triadic

#3F48A3 #A33F48 #48A33F

tetradic

#3F48A3 #A33F7A #A39A3F #3FA368

square

#3F48A3 #A33F7A #A39A3F #3FA368

split-complementary

#3F48A3 #A3683F #7AA33F

monochromatic

#1D214B #2E3577 #3F48A3 #5E67C1 #8A91D2

Accessibility & contrast

On white

7.87

#3F48A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#3F48A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F48A3

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F48A3	#FFFFFF	#000000	##FFFFFF
##3F48A3	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0256A6

Deuteranopia (green-blind)

#004DA1

Tritanopia (blue-blind)

#005D6E

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f48a3;
/* rgb */ color: rgb(63, 72, 163);
/* oklch */ color: oklch(44.7% 0.145 274.6);

Tailwind

colors: {
  custom: {
    50: '#7e7abf',
    500: '#3f48a3',
    950: '#000000',
  },
}

SCSS

$custom: #3f48a3;
$custom-light: #7e7abf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f48a3",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 163
  },
  "hsl": {
    "h": 234.6,
    "s": 44.248,
    "l": 44.314
  },
  "oklch": {
    "l": 0.44663,
    "c": 0.14542,
    "h": 274.6
  },
  "luminance": 0.08336
}

Semantic roles & 50–950 ramp

primary

#3F48A3

secondary

#BDB781

accent

#C854D4

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0B0912

muted

#7C7B81

Preview Lab

Preview with #3F48A3

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

Preview Lab → · Contrast checker → · Palette generator →