#1F128A#1F128A

#1F128A is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.5% C 0.180 H 273.5°. Best body text is #FFFFFF at 13.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F128A
RGB	rgb(31, 18, 138)
HSL	hsl(247, 77%, 31%)
HSV	hsv(247, 87%, 54%)
CMYK	cmyk(77.5%, 87%, 0%, 45.9%)
CIE-LAB	lab(18.18, 44.50, -62.30)
CIE-LCH	lch(18.18, 76.56, 305.54°)
OKLab	oklab(31.46% 0.0109 -0.1801)
OKLCH	oklch(31.46% 0.18 273.5)
XYZ	xyz(5.3673, 2.5583, 24.2508)
Luminance	0.0256 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F128A #7D8A12

analogous

#12418A #1F128A #5B128A

triadic

#1F128A #8A1F12 #128A1F

tetradic

#1F128A #8A1241 #7D8A12 #128A5B

square

#1F128A #8A1241 #7D8A12 #128A5B

split-complementary

#1F128A #8A5B12 #418A12

monochromatic

#07041E #130B54 #1F128A #2B19C0 #4532E4

Accessibility & contrast

On white

13.89

#1F128A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1F128A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F128A

13.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F128A	#FFFFFF	#000000	##FFFFFF
##1F128A	1.00	13.89	1.51	13.89
#FFFFFF	13.89	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00328D

Deuteranopia (green-blind)

#002788

Tritanopia (blue-blind)

#003A51

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1f128a;
/* rgb */ color: rgb(31, 18, 138);
/* oklch */ color: oklch(31.5% 0.180 273.5);

Tailwind

colors: {
  custom: {
    50: '#6f55ae',
    500: '#1f128a',
    950: '#000000',
  },
}

SCSS

$custom: #1f128a;
$custom-light: #6f55ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f128a",
  "rgb": {
    "r": 31,
    "g": 18,
    "b": 138
  },
  "hsl": {
    "h": 246.5,
    "s": 76.923,
    "l": 30.588
  },
  "oklch": {
    "l": 0.31461,
    "c": 0.18047,
    "h": 273.5
  },
  "luminance": 0.02559
}

Semantic roles & 50–950 ramp

primary

#1F128A

secondary

#B0BF39

accent

#F334DF

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1F128A

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

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