#1F137B#1F137B

#1F137B is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.7% C 0.162 H 275.3°. Best body text is #FFFFFF at 14.61:1 contrast (WCAG AA passes).

Color values

HEX	#1F137B
RGB	rgb(31, 19, 123)
HSL	hsl(247, 73%, 28%)
HSV	hsv(247, 85%, 48%)
CMYK	cmyk(74.8%, 84.6%, 0%, 51.8%)
CIE-LAB	lab(16.44, 39.33, -55.69)
CIE-LCH	lch(16.44, 68.18, 305.23°)
OKLab	oklab(29.72% 0.0151 -0.161)
OKLCH	oklch(29.72% 0.162 275.3)
XYZ	xyz(4.3719, 2.1867, 18.9267)
Luminance	0.0219 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F137B #6F7B13

analogous

#133B7B #1F137B #53137B

triadic

#1F137B #7B1F13 #137B1F

tetradic

#1F137B #7B133B #6F7B13 #137B53

square

#1F137B #7B133B #6F7B13 #137B53

split-complementary

#1F137B #7B5313 #3B7B13

monochromatic

#07041B #120B46 #1F137B #2C1BB0 #3F2ADE

Accessibility & contrast

On white

14.61

#1F137B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.44

#1F137B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F137B

14.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F137B	#FFFFFF	#000000	##FFFFFF
##1F137B	1.00	14.61	1.44	14.61
#FFFFFF	14.61	1.00	21.00	1.00
#000000	1.44	21.00	1.00	21.00
##FFFFFF	14.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D7E

Deuteranopia (green-blind)

#002479

Tritanopia (blue-blind)

#003448

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1f137b;
/* rgb */ color: rgb(31, 19, 123);
/* oklch */ color: oklch(29.7% 0.162 275.3);

Tailwind

colors: {
  custom: {
    50: '#6c54a2',
    500: '#1f137b',
    950: '#000000',
  },
}

SCSS

$custom: #1f137b;
$custom-light: #6c54a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f137b",
  "rgb": {
    "r": 31,
    "g": 19,
    "b": 123
  },
  "hsl": {
    "h": 246.923,
    "s": 73.239,
    "l": 27.843
  },
  "oklch": {
    "l": 0.29715,
    "c": 0.1617,
    "h": 275.3
  },
  "luminance": 0.02187
}

Semantic roles & 50–950 ramp

primary

#1F137B

secondary

#A3B139

accent

#F038DB

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1F137B

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

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