#3B59CB#3B59CB

#3B59CB is a mid, vivid blue. Relative luminance 0.124; OKLCH L 50.9% C 0.180 H 268.2°. Best body text is #FFFFFF at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#3B59CB
RGB	rgb(59, 89, 203)
HSL	hsl(228, 58%, 51%)
HSV	hsv(228, 71%, 80%)
CMYK	cmyk(70.9%, 56.2%, 0%, 20.4%)
CIE-LAB	lab(41.82, 27.72, -62.46)
CIE-LCH	lch(41.82, 68.33, 293.93°)
OKLab	oklab(50.89% -0.0058 -0.18)
OKLCH	oklch(50.89% 0.18 268.2)
XYZ	xyz(16.1518, 12.3847, 58.0276)
Luminance	0.1239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B59CB #CBAD3B

analogous

#3BA1CB #3B59CB #653BCB

triadic

#3B59CB #CB3B59 #59CB3B

tetradic

#3B59CB #CB3BA1 #CBAD3B #3BCB65

square

#3B59CB #CB3BA1 #CBAD3B #3BCB65

split-complementary

#3B59CB #CB653B #A1CB3B

monochromatic

#1D2E6E #2A429F #3B59CB #6B82D8 #9CABE5

Accessibility & contrast

On white

6.04

#3B59CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#3B59CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B59CB

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B59CB	#FFFFFF	#000000	##FFFFFF
##3B59CB	1.00	6.04	3.48	6.04
#FFFFFF	6.04	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006ACF

Deuteranopia (green-blind)

#005CC9

Tritanopia (blue-blind)

#007589

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3b59cb;
/* rgb */ color: rgb(59, 89, 203);
/* oklch */ color: oklch(50.9% 0.180 268.2);

Tailwind

colors: {
  custom: {
    50: '#8387dc',
    500: '#3b59cb',
    950: '#000000',
  },
}

SCSS

$custom: #3b59cb;
$custom-light: #8387dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3b59cb",
  "rgb": {
    "r": 59,
    "g": 89,
    "b": 203
  },
  "hsl": {
    "h": 227.5,
    "s": 58.065,
    "l": 51.373
  },
  "oklch": {
    "l": 0.50888,
    "c": 0.18006,
    "h": 268.2
  },
  "luminance": 0.12386
}

Semantic roles & 50–950 ramp

primary

#3B59CB

secondary

#D1C391

accent

#C147E1

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3B59CB

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

Preview Lab → · Contrast checker → · Palette generator →