#1F317A#1F317A

#1F317A is a dark, vivid blue. Relative luminance 0.039; OKLCH L 34.7% C 0.126 H 268.4°. Best body text is #FFFFFF at 11.81:1 contrast (WCAG AA passes).

Color values

HEX	#1F317A
RGB	rgb(31, 49, 122)
HSL	hsl(228, 59%, 30%)
HSV	hsv(228, 75%, 48%)
CMYK	cmyk(74.6%, 59.8%, 0%, 52.2%)
CIE-LAB	lab(23.31, 20.06, -43.76)
CIE-LCH	lch(23.31, 48.14, 294.62°)
OKLab	oklab(34.65% -0.0034 -0.1262)
OKLCH	oklch(34.65% 0.126 268.4)
XYZ	xyz(5.1750, 3.8925, 18.8872)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F317A #7A681F

analogous

#1F5E7A #1F317A #3B1F7A

triadic

#1F317A #7A1F31 #317A1F

tetradic

#1F317A #7A1F5E #7A681F #1F7A3B

square

#1F317A #7A1F5E #7A681F #1F7A3B

split-complementary

#1F317A #7A3B1F #5E7A1F

monochromatic

#060A18 #131D49 #1F317A #2B45AB #4460CF

Accessibility & contrast

On white

11.81

#1F317A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1F317A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F317A

11.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F317A	#FFFFFF	#000000	##FFFFFF
##1F317A	1.00	11.81	1.78	11.81
#FFFFFF	11.81	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C7C

Deuteranopia (green-blind)

#003479

Tritanopia (blue-blind)

#004350

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f317a;
/* rgb */ color: rgb(31, 49, 122);
/* oklch */ color: oklch(34.7% 0.126 268.4);

Tailwind

colors: {
  custom: {
    50: '#6868a1',
    500: '#1f317a',
    950: '#000000',
  },
}

SCSS

$custom: #1f317a;
$custom-light: #6868a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f317a",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 122
  },
  "hsl": {
    "h": 228.132,
    "s": 59.477,
    "l": 30
  },
  "oklch": {
    "l": 0.34651,
    "c": 0.12622,
    "h": 268.4
  },
  "luminance": 0.03893
}

Semantic roles & 50–950 ramp

primary

#1F317A

secondary

#AD9947

accent

#C345E3

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F317A

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

Preview Lab → · Contrast checker → · Palette generator →