#3B57CB#3B57CB

#3B57CB is a mid, vivid blue. Relative luminance 0.121; OKLCH L 50.5% C 0.183 H 268.7°. Best body text is #FFFFFF at 6.16:1 contrast (WCAG AA passes).

Color values

HEX	#3B57CB
RGB	rgb(59, 87, 203)
HSL	hsl(228, 58%, 51%)
HSV	hsv(228, 71%, 80%)
CMYK	cmyk(70.9%, 57.1%, 0%, 20.4%)
CIE-LAB	lab(41.31, 29.00, -63.30)
CIE-LCH	lch(41.31, 69.62, 294.61°)
OKLab	oklab(50.5% -0.0042 -0.1825)
OKLCH	oklch(50.5% 0.183 268.7)
XYZ	xyz(15.9876, 12.0564, 57.9729)
Luminance	0.1206 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B57CB #CBAF3B

analogous

#3B9FCB #3B57CB #673BCB

triadic

#3B57CB #CB3B57 #57CB3B

tetradic

#3B57CB #CB3B9F #CBAF3B #3BCB67

square

#3B57CB #CB3B9F #CBAF3B #3BCB67

split-complementary

#3B57CB #CB673B #9FCB3B

monochromatic

#1D2D6E #2A419F #3B57CB #6B80D8 #9CAAE5

Accessibility & contrast

On white

6.16

#3B57CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.41

#3B57CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B57CB

6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B57CB	#FFFFFF	#000000	##FFFFFF
##3B57CB	1.00	6.16	3.41	6.16
#FFFFFF	6.16	1.00	21.00	1.00
#000000	3.41	21.00	1.00	21.00
##FFFFFF	6.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068CF

Deuteranopia (green-blind)

#005BC9

Tritanopia (blue-blind)

#007488

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3b57cb;
/* rgb */ color: rgb(59, 87, 203);
/* oklch */ color: oklch(50.5% 0.183 268.7);

Tailwind

colors: {
  custom: {
    50: '#8386dc',
    500: '#3b57cb',
    950: '#000000',
  },
}

SCSS

$custom: #3b57cb;
$custom-light: #8386dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3b57cb",
  "rgb": {
    "r": 59,
    "g": 87,
    "b": 203
  },
  "hsl": {
    "h": 228.333,
    "s": 58.065,
    "l": 51.373
  },
  "oklch": {
    "l": 0.50502,
    "c": 0.18251,
    "h": 268.7
  },
  "luminance": 0.12058
}

Semantic roles & 50–950 ramp

primary

#3B57CB

secondary

#D1C491

accent

#C347E1

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3B57CB

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

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