#1F137A#1F137A

#1F137A is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.6% C 0.160 H 275.5°. Best body text is #FFFFFF at 14.66:1 contrast (WCAG AA passes).

Color values

HEX	#1F137A
RGB	rgb(31, 19, 122)
HSL	hsl(247, 73%, 28%)
HSV	hsv(247, 84%, 48%)
CMYK	cmyk(74.6%, 84.4%, 0%, 52.2%)
CIE-LAB	lab(16.31, 39.01, -55.26)
CIE-LCH	lch(16.31, 67.64, 305.22°)
OKLab	oklab(29.59% 0.0154 -0.1597)
OKLCH	oklch(29.59% 0.16 275.5)
XYZ	xyz(4.3096, 2.1618, 18.5987)
Luminance	0.0216 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F137A #6E7A13

analogous

#133B7A #1F137A #52137A

triadic

#1F137A #7A1F13 #137A1F

tetradic

#1F137A #7A133B #6E7A13 #137A52

square

#1F137A #7A133B #6E7A13 #137A52

split-complementary

#1F137A #7A5213 #3B7A13

monochromatic

#07041A #120B45 #1F137A #2C1BAF #3F2ADE

Accessibility & contrast

On white

14.66

#1F137A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1F137A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F137A

14.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F137A	#FFFFFF	#000000	##FFFFFF
##1F137A	1.00	14.66	1.43	14.66
#FFFFFF	14.66	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D7D

Deuteranopia (green-blind)

#002478

Tritanopia (blue-blind)

#003347

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1f137a;
/* rgb */ color: rgb(31, 19, 122);
/* oklch */ color: oklch(29.6% 0.160 275.5);

Tailwind

colors: {
  custom: {
    50: '#6b54a2',
    500: '#1f137a',
    950: '#000000',
  },
}

SCSS

$custom: #1f137a;
$custom-light: #6b54a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f137a",
  "rgb": {
    "r": 31,
    "g": 19,
    "b": 122
  },
  "hsl": {
    "h": 246.99,
    "s": 73.05,
    "l": 27.647
  },
  "oklch": {
    "l": 0.29594,
    "c": 0.16048,
    "h": 275.5
  },
  "luminance": 0.02162
}

Semantic roles & 50–950 ramp

primary

#1F137A

secondary

#A2B039

accent

#F038DA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1F137A

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

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