#313B8E#313B8E

#313B8E is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.5% C 0.137 H 273.2°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#313B8E
RGB	rgb(49, 59, 142)
HSL	hsl(234, 49%, 37%)
HSV	hsv(234, 65%, 56%)
CMYK	cmyk(65.5%, 58.5%, 0%, 44.3%)
CIE-LAB	lab(28.73, 23.66, -47.41)
CIE-LCH	lch(28.73, 52.99, 296.52°)
OKLab	oklab(39.49% 0.0077 -0.1363)
OKLCH	oklch(39.49% 0.137 273.2)
XYZ	xyz(7.7115, 5.7332, 26.2862)
Luminance	0.0573 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B8E #8E8431

analogous

#316A8E #313B8E #55318E

triadic

#313B8E #8E313B #3B8E31

tetradic

#313B8E #8E316A #8E8431 #318E55

square

#313B8E #8E316A #8E8431 #318E55

split-complementary

#313B8E #8E5531 #6A8E31

monochromatic

#121533 #212861 #313B8E #414EBB #6D77CD

Accessibility & contrast

On white

9.78

#313B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#313B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B8E

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B8E	#FFFFFF	#000000	##FFFFFF
##313B8E	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004891

Deuteranopia (green-blind)

#00408C

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313b8e;
/* rgb */ color: rgb(49, 59, 142);
/* oklch */ color: oklch(39.5% 0.137 273.2);

Tailwind

colors: {
  custom: {
    50: '#7470b0',
    500: '#313b8e',
    950: '#000000',
  },
}

SCSS

$custom: #313b8e;
$custom-light: #7470b0;
$custom-dark: #000000;

JSON

{
  "hex": "#313b8e",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 142
  },
  "hsl": {
    "h": 233.548,
    "s": 48.691,
    "l": 37.451
  },
  "oklch": {
    "l": 0.39486,
    "c": 0.13656,
    "h": 273.2
  },
  "luminance": 0.05734
}

Semantic roles & 50–950 ramp

primary

#313B8E

secondary

#B4AC67

accent

#CA50D8

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313B8E

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

Preview Lab → · Contrast checker → · Palette generator →