#1F139A#1F139A

#1F139A is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.6% C 0.198 H 271.8°. Best body text is #FFFFFF at 12.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F139A
RGB	rgb(31, 19, 154)
HSL	hsl(245, 78%, 34%)
HSV	hsv(245, 88%, 60%)
CMYK	cmyk(79.9%, 87.7%, 0%, 39.6%)
CIE-LAB	lab(20.40, 48.92, -68.55)
CIE-LCH	lch(20.40, 84.22, 305.51°)
OKLab	oklab(33.57% 0.0061 -0.1982)
OKLCH	oklch(33.57% 0.198 271.8)
XYZ	xyz(6.6287, 3.0894, 30.8125)
Luminance	0.0309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F139A #8E9A13

analogous

#134B9A #1F139A #63139A

triadic

#1F139A #9A1F13 #139A1F

tetradic

#1F139A #9A134B #8E9A13 #139A63

square

#1F139A #9A134B #8E9A13 #139A63

split-complementary

#1F139A #9A6313 #4B9A13

monochromatic

#09062D #140C64 #1F139A #2A1AD0 #4F40E7

Accessibility & contrast

On white

12.98

#1F139A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1F139A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F139A

12.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F139A	#FFFFFF	#000000	##FFFFFF
##1F139A	1.00	12.98	1.62	12.98
#FFFFFF	12.98	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00379E

Deuteranopia (green-blind)

#002A98

Tritanopia (blue-blind)

#00415A

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f139a;
/* rgb */ color: rgb(31, 19, 154);
/* oklch */ color: oklch(33.6% 0.198 271.8);

Tailwind

colors: {
  custom: {
    50: '#7357b9',
    500: '#1f139a',
    950: '#000000',
  },
}

SCSS

$custom: #1f139a;
$custom-light: #7357b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f139a",
  "rgb": {
    "r": 31,
    "g": 19,
    "b": 154
  },
  "hsl": {
    "h": 245.333,
    "s": 78.035,
    "l": 33.922
  },
  "oklch": {
    "l": 0.3357,
    "c": 0.19834,
    "h": 271.8
  },
  "luminance": 0.0309
}

Semantic roles & 50–950 ramp

primary

#1F139A

secondary

#BBC741

accent

#F533E3

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0312

muted

#7C7881

Preview Lab

Preview with #1F139A

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

Preview Lab → · Contrast checker → · Palette generator →