#3951CB#3951CB

#3951CB is a mid, vivid blue. Relative luminance 0.111; OKLCH L 49.3% C 0.190 H 269.5°. Best body text is #FFFFFF at 6.54:1 contrast (WCAG AA passes).

Color values

HEX	#3951CB
RGB	rgb(57, 81, 203)
HSL	hsl(230, 58%, 51%)
HSV	hsv(230, 72%, 80%)
CMYK	cmyk(71.9%, 60.1%, 0%, 20.4%)
CIE-LAB	lab(39.69, 32.57, -65.93)
CIE-LCH	lch(39.69, 73.54, 296.29°)
OKLab	oklab(49.27% -0.0017 -0.1903)
OKLCH	oklch(49.27% 0.19 269.5)
XYZ	xyz(15.4056, 11.0649, 57.8122)
Luminance	0.1107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3951CB #CBB339

analogous

#399ACB #3951CB #6A39CB

triadic

#3951CB #CB3951 #51CB39

tetradic

#3951CB #CB399A #CBB339 #39CB6A

square

#3951CB #CB399A #CBB339 #39CB6A

split-complementary

#3951CB #CB6A39 #9ACB39

monochromatic

#1D2A6D #293C9D #3951CB #697CD8 #9AA6E4

Accessibility & contrast

On white

6.54

#3951CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.21

#3951CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3951CB

6.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3951CB	#FFFFFF	#000000	##FFFFFF
##3951CB	1.00	6.54	3.21	6.54
#FFFFFF	6.54	1.00	21.00	1.00
#000000	3.21	21.00	1.00	21.00
##FFFFFF	6.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064CF

Deuteranopia (green-blind)

#0057C9

Tritanopia (blue-blind)

#007086

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3951cb;
/* rgb */ color: rgb(57, 81, 203);
/* oklch */ color: oklch(49.3% 0.190 269.5);

Tailwind

colors: {
  custom: {
    50: '#8381dc',
    500: '#3951cb',
    950: '#000000',
  },
}

SCSS

$custom: #3951cb;
$custom-light: #8381dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3951cb",
  "rgb": {
    "r": 57,
    "g": 81,
    "b": 203
  },
  "hsl": {
    "h": 230.137,
    "s": 58.4,
    "l": 50.98
  },
  "oklch": {
    "l": 0.49271,
    "c": 0.19033,
    "h": 269.5
  },
  "luminance": 0.11067
}

Semantic roles & 50–950 ramp

primary

#3951CB

secondary

#D0C690

accent

#C846E2

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3951CB

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

Preview Lab → · Contrast checker → · Palette generator →