#3F65B4#3F65B4

#3F65B4 is a mid, vivid blue. Relative luminance 0.137; OKLCH L 51.9% C 0.132 H 263.2°. Best body text is #FFFFFF at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#3F65B4
RGB	rgb(63, 101, 180)
HSL	hsl(221, 48%, 48%)
HSV	hsv(221, 65%, 71%)
CMYK	cmyk(65%, 43.9%, 0%, 29.4%)
CIE-LAB	lab(43.74, 12.34, -46.00)
CIE-LCH	lch(43.74, 47.63, 285.02°)
OKLab	oklab(51.91% -0.0156 -0.1313)
OKLCH	oklch(51.91% 0.132 263.2)
XYZ	xyz(14.9389, 13.6580, 45.0202)
Luminance	0.1366 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F65B4 #B48E3F

analogous

#3F9FB4 #3F65B4 #543FB4

triadic

#3F65B4 #B43F65 #65B43F

tetradic

#3F65B4 #B43F9F #B48E3F #3FB454

square

#3F65B4 #B43F9F #B48E3F #3FB454

split-complementary

#3F65B4 #B4543F #9FB43F

monochromatic

#1F3259 #2F4C87 #3F65B4 #6787CA #94ABDA

Accessibility & contrast

On white

5.63

#3F65B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.73

#3F65B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F65B4

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F65B4	#FFFFFF	#000000	##FFFFFF
##3F65B4	1.00	5.63	3.73	5.63
#FFFFFF	5.63	1.00	21.00	1.00
#000000	3.73	21.00	1.00	21.00
##FFFFFF	5.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#406DB7

Deuteranopia (green-blind)

#2D62B2

Tritanopia (blue-blind)

#007784

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3f65b4;
/* rgb */ color: rgb(63, 101, 180);
/* oklch */ color: oklch(51.9% 0.132 263.2);

Tailwind

colors: {
  custom: {
    50: '#8090cb',
    500: '#3f65b4',
    950: '#000000',
  },
}

SCSS

$custom: #3f65b4;
$custom-light: #8090cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f65b4",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 180
  },
  "hsl": {
    "h": 220.513,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.51908,
    "c": 0.13223,
    "h": 263.2
  },
  "luminance": 0.13659
}

Semantic roles & 50–950 ramp

primary

#3F65B4

secondary

#C5B28A

accent

#AC50D8

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3F65B4

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

Preview Lab → · Contrast checker → · Palette generator →