#3F5BD9#3F5BD9

#3F5BD9 is a mid, vivid blue. Relative luminance 0.135; OKLCH L 52.6% C 0.195 H 269.1°. Best body text is #FFFFFF at 5.66:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BD9
RGB	rgb(63, 91, 217)
HSL	hsl(229, 67%, 55%)
HSV	hsv(229, 71%, 85%)
CMYK	cmyk(71%, 58.1%, 0%, 14.9%)
CIE-LAB	lab(43.58, 31.98, -67.63)
CIE-LCH	lch(43.58, 74.81, 295.31°)
OKLab	oklab(52.58% -0.0032 -0.1951)
OKLCH	oklch(52.58% 0.195 269.1)
XYZ	xyz(18.3111, 13.5468, 67.2820)
Luminance	0.1355 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BD9 #D9BD3F

analogous

#3FA8D9 #3F5BD9 #703FD9

triadic

#3F5BD9 #D93F5B #5BD93F

tetradic

#3F5BD9 #D93FA8 #D9BD3F #3FD970

square

#3F5BD9 #D93FA8 #D9BD3F #3FD970

split-complementary

#3F5BD9 #D9703F #A8D93F

monochromatic

#1A2D84 #243FB7 #3F5BD9 #7287E3 #A5B2ED

Accessibility & contrast

On white

5.66

#3F5BD9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#3F5BD9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BD9

5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BD9	#FFFFFF	#000000	##FFFFFF
##3F5BD9	1.00	5.66	3.71	5.66
#FFFFFF	5.66	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006EDD

Deuteranopia (green-blind)

#0060D7

Tritanopia (blue-blind)

#007A91

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3f5bd9;
/* rgb */ color: rgb(63, 91, 217);
/* oklch */ color: oklch(52.6% 0.195 269.1);

Tailwind

colors: {
  custom: {
    50: '#8889e6',
    500: '#3f5bd9',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bd9;
$custom-light: #8889e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bd9",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 217
  },
  "hsl": {
    "h": 229.091,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.52583,
    "c": 0.19509,
    "h": 269.1
  },
  "luminance": 0.13549
}

Semantic roles & 50–950 ramp

primary

#3F5BD9

secondary

#DACF9A

accent

#CB3EEA

background

#F9F8FE

surface

#F1F0FC

border

#CBCBD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3F5BD9

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

Preview Lab → · Contrast checker → · Palette generator →