#313B8F#313B8F

#313B8F is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.6% C 0.138 H 273.2°. Best body text is #FFFFFF at 9.75:1 contrast (WCAG AA passes).

Color values

HEX	#313B8F
RGB	rgb(49, 59, 143)
HSL	hsl(234, 49%, 38%)
HSV	hsv(234, 66%, 56%)
CMYK	cmyk(65.7%, 58.7%, 0%, 43.9%)
CIE-LAB	lab(28.81, 24.02, -47.90)
CIE-LCH	lch(28.81, 53.59, 296.63°)
OKLab	oklab(39.57% 0.0077 -0.1378)
OKLCH	oklch(39.57% 0.138 273.2)
XYZ	xyz(7.7869, 5.7634, 26.6834)
Luminance	0.0576 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B8F #8F8531

analogous

#316A8F #313B8F #56318F

triadic

#313B8F #8F313B #3B8F31

tetradic

#313B8F #8F316A #8F8531 #318F56

square

#313B8F #8F316A #8F8531 #318F56

split-complementary

#313B8F #8F5631 #6A8F31

monochromatic

#121534 #212861 #313B8F #414EBD #6D78CD

Accessibility & contrast

On white

9.75

#313B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#313B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B8F

9.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B8F	#FFFFFF	#000000	##FFFFFF
##313B8F	1.00	9.75	2.15	9.75
#FFFFFF	9.75	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#00408D

Tritanopia (blue-blind)

#004F5F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313b8f;
/* rgb */ color: rgb(49, 59, 143);
/* oklch */ color: oklch(39.6% 0.138 273.2);

Tailwind

colors: {
  custom: {
    50: '#7470b0',
    500: '#313b8f',
    950: '#000000',
  },
}

SCSS

$custom: #313b8f;
$custom-light: #7470b0;
$custom-dark: #000000;

JSON

{
  "hex": "#313b8f",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 143
  },
  "hsl": {
    "h": 233.617,
    "s": 48.958,
    "l": 37.647
  },
  "oklch": {
    "l": 0.39569,
    "c": 0.138,
    "h": 273.2
  },
  "luminance": 0.05764
}

Semantic roles & 50–950 ramp

primary

#313B8F

secondary

#B5AC67

accent

#CA4FD9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090711

muted

#7B7A80

Preview Lab

Preview with #313B8F

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

Preview Lab → · Contrast checker → · Palette generator →