#31357B#31357B

#31357B is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.7% C 0.117 H 276.5°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#31357B
RGB	rgb(49, 53, 123)
HSL	hsl(237, 43%, 34%)
HSV	hsv(237, 60%, 48%)
CMYK	cmyk(60.2%, 56.9%, 0%, 51.8%)
CIE-LAB	lab(25.65, 20.81, -40.55)
CIE-LCH	lch(25.65, 45.58, 297.17°)
OKLab	oklab(36.73% 0.0133 -0.1162)
OKLCH	oklch(36.73% 0.117 276.5)
XYZ	xyz(6.1137, 4.6288, 19.3063)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31357B #7B7731

analogous

#315A7B #31357B #52317B

triadic

#31357B #7B3135 #357B31

tetradic

#31357B #7B315A #7B7731 #317B52

square

#31357B #7B315A #7B7731 #317B52

split-complementary

#31357B #7B5231 #5A7B31

monochromatic

#0E0F23 #20224F #31357B #4248A7 #656AC2

Accessibility & contrast

On white

10.90

#31357B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#31357B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31357B

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31357B	#FFFFFF	#000000	##FFFFFF
##31357B	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05407D

Deuteranopia (green-blind)

#003A7A

Tritanopia (blue-blind)

#014552

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #31357b;
/* rgb */ color: rgb(49, 53, 123);
/* oklch */ color: oklch(36.7% 0.117 276.5);

Tailwind

colors: {
  custom: {
    50: '#716ca2',
    500: '#31357b',
    950: '#000000',
  },
}

SCSS

$custom: #31357b;
$custom-light: #716ca2;
$custom-dark: #000000;

JSON

{
  "hex": "#31357b",
  "rgb": {
    "r": 49,
    "g": 53,
    "b": 123
  },
  "hsl": {
    "h": 236.757,
    "s": 43.023,
    "l": 33.725
  },
  "oklch": {
    "l": 0.36727,
    "c": 0.11697,
    "h": 276.5
  },
  "luminance": 0.04629
}

Semantic roles & 50–950 ramp

primary

#31357B

secondary

#A9A55F

accent

#CC55D3

background

#F7F6FA

surface

#EDEBF3

border

#C8C6CD

text

#08060F

muted

#7B7A7F

Preview Lab

Preview with #31357B

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

Preview Lab → · Contrast checker → · Palette generator →