#1F317E#1F317E

#1F317E is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.0% C 0.132 H 268.6°. Best body text is #FFFFFF at 11.67:1 contrast (WCAG AA passes).

Color values

HEX	#1F317E
RGB	rgb(31, 49, 126)
HSL	hsl(229, 61%, 31%)
HSV	hsv(229, 75%, 49%)
CMYK	cmyk(75.4%, 61.1%, 0%, 50.6%)
CIE-LAB	lab(23.65, 21.64, -45.74)
CIE-LCH	lch(23.65, 50.60, 295.32°)
OKLab	oklab(35.01% -0.0033 -0.132)
OKLCH	oklch(35.01% 0.132 268.6)
XYZ	xyz(5.4280, 3.9937, 20.2194)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F317E #7E6C1F

analogous

#1F607E #1F317E #3C1F7E

triadic

#1F317E #7E1F31 #317E1F

tetradic

#1F317E #7E1F60 #7E6C1F #1F7E3C

square

#1F317E #7E1F60 #7E6C1F #1F7E3C

split-complementary

#1F317E #7E3C1F #607E1F

monochromatic

#070B1C #131E4D #1F317E #2B44AF #4660D1

Accessibility & contrast

On white

11.67

#1F317E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1F317E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F317E

11.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F317E	#FFFFFF	#000000	##FFFFFF
##1F317E	1.00	11.67	1.80	11.67
#FFFFFF	11.67	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D81

Deuteranopia (green-blind)

#00347C

Tritanopia (blue-blind)

#004452

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f317e;
/* rgb */ color: rgb(31, 49, 126);
/* oklch */ color: oklch(35.0% 0.132 268.6);

Tailwind

colors: {
  custom: {
    50: '#6968a4',
    500: '#1f317e',
    950: '#000000',
  },
}

SCSS

$custom: #1f317e;
$custom-light: #6968a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f317e",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 126
  },
  "hsl": {
    "h": 228.632,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.35009,
    "c": 0.13203,
    "h": 268.6
  },
  "luminance": 0.03994
}

Semantic roles & 50–950 ramp

primary

#1F317E

secondary

#B19D48

accent

#C544E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F317E

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

Preview Lab → · Contrast checker → · Palette generator →