#1F317F#1F317F

#1F317F is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.1% C 0.133 H 268.6°. Best body text is #FFFFFF at 11.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F317F
RGB	rgb(31, 49, 127)
HSL	hsl(229, 61%, 31%)
HSV	hsv(229, 76%, 50%)
CMYK	cmyk(75.6%, 61.4%, 0%, 50.2%)
CIE-LAB	lab(23.74, 22.03, -46.23)
CIE-LCH	lch(23.74, 51.21, 295.48°)
OKLab	oklab(35.1% -0.0033 -0.1334)
OKLCH	oklch(35.1% 0.133 268.6)
XYZ	xyz(5.4928, 4.0197, 20.5609)
Luminance	0.0402 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F317F #7F6D1F

analogous

#1F617F #1F317F #3D1F7F

triadic

#1F317F #7F1F31 #317F1F

tetradic

#1F317F #7F1F61 #7F6D1F #1F7F3D

square

#1F317F #7F1F61 #7F6D1F #1F7F3D

split-complementary

#1F317F #7F3D1F #617F1F

monochromatic

#070B1D #131E4E #1F317F #2B44B0 #4661D2

Accessibility & contrast

On white

11.64

#1F317F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1F317F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F317F

11.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F317F	#FFFFFF	#000000	##FFFFFF
##1F317F	1.00	11.64	1.80	11.64
#FFFFFF	11.64	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D82

Deuteranopia (green-blind)

#00347D

Tritanopia (blue-blind)

#004553

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f317f;
/* rgb */ color: rgb(31, 49, 127);
/* oklch */ color: oklch(35.1% 0.133 268.6);

Tailwind

colors: {
  custom: {
    50: '#6a68a5',
    500: '#1f317f',
    950: '#000000',
  },
}

SCSS

$custom: #1f317f;
$custom-light: #6a68a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f317f",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 127
  },
  "hsl": {
    "h": 228.75,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.35099,
    "c": 0.13347,
    "h": 268.6
  },
  "luminance": 0.0402
}

Semantic roles & 50–950 ramp

primary

#1F317F

secondary

#B29E48

accent

#C644E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F317F

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

Preview Lab → · Contrast checker → · Palette generator →