#3957A9#3957A9

#3957A9 is a mid, vivid blue. Relative luminance 0.106; OKLCH L 47.8% C 0.136 H 266.2°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#3957A9
RGB	rgb(57, 87, 169)
HSL	hsl(224, 50%, 44%)
HSV	hsv(224, 66%, 66%)
CMYK	cmyk(66.3%, 48.5%, 0%, 33.7%)
CIE-LAB	lab(38.81, 16.34, -47.43)
CIE-LCH	lch(38.81, 50.17, 289.00°)
OKLab	oklab(47.83% -0.0089 -0.1358)
OKLCH	oklch(47.83% 0.136 266.2)
XYZ	xyz(12.2545, 10.5497, 38.9189)
Luminance	0.1055 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957A9 #A98B39

analogous

#398FA9 #3957A9 #5339A9

triadic

#3957A9 #A93957 #57A939

tetradic

#3957A9 #A9398F #A98B39 #39A953

square

#3957A9 #A9398F #A98B39 #39A953

split-complementary

#3957A9 #A95339 #8FA939

monochromatic

#1A284D #2A3F7B #3957A9 #5876C7 #869CD6

Accessibility & contrast

On white

6.75

#3957A9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3957A9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957A9

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957A9	#FFFFFF	#000000	##FFFFFF
##3957A9	1.00	6.75	3.11	6.75
#FFFFFF	6.75	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C61AC

Deuteranopia (green-blind)

#1357A7

Tritanopia (blue-blind)

#006A78

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3957a9;
/* rgb */ color: rgb(57, 87, 169);
/* oklch */ color: oklch(47.8% 0.136 266.2);

Tailwind

colors: {
  custom: {
    50: '#7b85c3',
    500: '#3957a9',
    950: '#000000',
  },
}

SCSS

$custom: #3957a9;
$custom-light: #7b85c3;
$custom-dark: #000000;

JSON

{
  "hex": "#3957a9",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 169
  },
  "hsl": {
    "h": 223.929,
    "s": 49.558,
    "l": 44.314
  },
  "oklch": {
    "l": 0.4783,
    "c": 0.13613,
    "h": 266.2
  },
  "luminance": 0.10551
}

Semantic roles & 50–950 ramp

primary

#3957A9

secondary

#C0AE7E

accent

#B44FD9

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #3957A9

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

Preview Lab → · Contrast checker → · Palette generator →