#3951BB#3951BB

#3951BB is a mid, vivid blue. Relative luminance 0.103; OKLCH L 48.0% C 0.169 H 269.3°. Best body text is #FFFFFF at 6.84:1 contrast (WCAG AA passes).

Color values

HEX	#3951BB
RGB	rgb(57, 81, 187)
HSL	hsl(229, 53%, 48%)
HSV	hsv(229, 70%, 73%)
CMYK	cmyk(69.5%, 56.7%, 0%, 26.7%)
CIE-LAB	lab(38.45, 26.81, -58.64)
CIE-LCH	lch(38.45, 64.47, 294.57°)
OKLab	oklab(47.96% -0.0019 -0.1689)
OKLCH	oklch(47.96% 0.169 269.3)
XYZ	xyz(13.5963, 10.3412, 48.2836)
Luminance	0.1034 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3951BB #BBA339

analogous

#3992BB #3951BB #6239BB

triadic

#3951BB #BB3951 #51BB39

tetradic

#3951BB #BB3992 #BBA339 #39BB62

square

#3951BB #BB3992 #BBA339 #39BB62

split-complementary

#3951BB #BB6239 #92BB39

monochromatic

#1C285D #2B3D8C #3951BB #6276CF #919FDD

Accessibility & contrast

On white

6.84

#3951BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#3951BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3951BB

6.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3951BB	#FFFFFF	#000000	##FFFFFF
##3951BB	1.00	6.84	3.07	6.84
#FFFFFF	6.84	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061BF

Deuteranopia (green-blind)

#0055B9

Tritanopia (blue-blind)

#006B7E

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3951bb;
/* rgb */ color: rgb(57, 81, 187);
/* oklch */ color: oklch(48.0% 0.169 269.3);

Tailwind

colors: {
  custom: {
    50: '#7f81d0',
    500: '#3951bb',
    950: '#000000',
  },
}

SCSS

$custom: #3951bb;
$custom-light: #7f81d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3951bb",
  "rgb": {
    "r": 57,
    "g": 81,
    "b": 187
  },
  "hsl": {
    "h": 228.923,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.47957,
    "c": 0.16889,
    "h": 269.3
  },
  "luminance": 0.10343
}

Semantic roles & 50–950 ramp

primary

#3951BB

secondary

#C8BC87

accent

#C24BDD

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3951BB

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

Preview Lab → · Contrast checker → · Palette generator →