#3957B8#3957B8

#3957B8 is a mid, vivid blue. Relative luminance 0.111; OKLCH L 48.9% C 0.157 H 267.4°. Best body text is #FFFFFF at 6.50:1 contrast (WCAG AA passes).

Color values

HEX	#3957B8
RGB	rgb(57, 87, 184)
HSL	hsl(226, 53%, 47%)
HSV	hsv(226, 69%, 72%)
CMYK	cmyk(69%, 52.7%, 0%, 27.8%)
CIE-LAB	lab(39.82, 21.82, -54.65)
CIE-LCH	lch(39.82, 58.84, 291.76°)
OKLab	oklab(48.92% -0.0072 -0.1571)
OKLCH	oklch(48.92% 0.157 267.4)
XYZ	xyz(13.7443, 11.1456, 46.7651)
Luminance	0.1115 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957B8 #B89A39

analogous

#3996B8 #3957B8 #5B39B8

triadic

#3957B8 #B83957 #57B839

tetradic

#3957B8 #B83996 #B89A39 #39B85B

square

#3957B8 #B83996 #B89A39 #39B85B

split-complementary

#3957B8 #B85B39 #96B839

monochromatic

#1C2B5B #2B4189 #3957B8 #607ACE #8FA1DC

Accessibility & contrast

On white

6.50

#3957B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.23

#3957B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957B8

6.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957B8	#FFFFFF	#000000	##FFFFFF
##3957B8	1.00	6.50	3.23	6.50
#FFFFFF	6.50	1.00	21.00	1.00
#000000	3.23	21.00	1.00	21.00
##FFFFFF	6.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1764BB

Deuteranopia (green-blind)

#0058B6

Tritanopia (blue-blind)

#006E7F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3957b8;
/* rgb */ color: rgb(57, 87, 184);
/* oklch */ color: oklch(48.9% 0.157 267.4);

Tailwind

colors: {
  custom: {
    50: '#7e85ce',
    500: '#3957b8',
    950: '#000000',
  },
}

SCSS

$custom: #3957b8;
$custom-light: #7e85ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3957b8",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 184
  },
  "hsl": {
    "h": 225.827,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.48924,
    "c": 0.15723,
    "h": 267.4
  },
  "luminance": 0.11147
}

Semantic roles & 50–950 ramp

primary

#3957B8

secondary

#C7B886

accent

#BA4CDC

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3957B8

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

Preview Lab → · Contrast checker → · Palette generator →