#1F156A#1F156A

#1F156A is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.0% C 0.138 H 277.9°. Best body text is #FFFFFF at 15.29:1 contrast (WCAG AA passes).

Color values

HEX	#1F156A
RGB	rgb(31, 21, 106)
HSL	hsl(247, 67%, 25%)
HSV	hsv(247, 80%, 42%)
CMYK	cmyk(70.8%, 80.2%, 0%, 58.4%)
CIE-LAB	lab(14.78, 32.63, -47.43)
CIE-LCH	lch(14.78, 57.57, 304.53°)
OKLab	oklab(27.96% 0.0189 -0.137)
OKLCH	oklch(27.96% 0.138 277.9)
XYZ	xyz(3.4339, 1.8679, 13.8125)
Luminance	0.0187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F156A #606A15

analogous

#15356A #1F156A #4A156A

triadic

#1F156A #6A1F15 #156A1F

tetradic

#1F156A #6A1535 #606A15 #156A4A

square

#1F156A #6A1535 #606A15 #156A4A

split-complementary

#1F156A #6A4A15 #356A15

monochromatic

#07051A #100B37 #1F156A #2E1F9D #3D29D0

Accessibility & contrast

On white

15.29

#1F156A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#1F156A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F156A

15.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F156A	#FFFFFF	#000000	##FFFFFF
##1F156A	1.00	15.29	1.37	15.29
#FFFFFF	15.29	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00296C

Deuteranopia (green-blind)

#002268

Tritanopia (blue-blind)

#002E3F

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1f156a;
/* rgb */ color: rgb(31, 21, 106);
/* oklch */ color: oklch(28.0% 0.138 277.9);

Tailwind

colors: {
  custom: {
    50: '#675496',
    500: '#1f156a',
    950: '#000000',
  },
}

SCSS

$custom: #1f156a;
$custom-light: #675496;
$custom-dark: #000000;

JSON

{
  "hex": "#1f156a",
  "rgb": {
    "r": 31,
    "g": 21,
    "b": 106
  },
  "hsl": {
    "h": 247.059,
    "s": 66.929,
    "l": 24.902
  },
  "oklch": {
    "l": 0.27963,
    "c": 0.13831,
    "h": 277.9
  },
  "luminance": 0.01868
}

Semantic roles & 50–950 ramp

primary

#1F156A

secondary

#95A13A

accent

#EA3ED6

background

#F6F4F9

surface

#EBE8F2

border

#C6C4CC

text

#07030D

muted

#7A787E

Preview Lab

Preview with #1F156A

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

Preview Lab → · Contrast checker → · Palette generator →