#1F1171#1F1171

#1F1171 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.3% C 0.151 H 277.2°. Best body text is #FFFFFF at 15.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F1171
RGB	rgb(31, 17, 113)
HSL	hsl(249, 74%, 25%)
HSV	hsv(249, 85%, 44%)
CMYK	cmyk(72.6%, 85%, 0%, 55.7%)
CIE-LAB	lab(14.87, 37.10, -51.85)
CIE-LCH	lch(14.87, 63.75, 305.58°)
OKLab	oklab(28.27% 0.019 -0.1498)
OKLCH	oklch(28.27% 0.151 277.2)
XYZ	xyz(3.7452, 1.8841, 15.7859)
Luminance	0.0188 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1171 #637111

analogous

#113371 #1F1171 #4F1171

triadic

#1F1171 #711F11 #11711F

tetradic

#1F1171 #711133 #637111 #11714F

square

#1F1171 #711133 #637111 #11714F

split-complementary

#1F1171 #714F11 #337111

monochromatic

#07041B #10093C #1F1171 #2E19A6 #3C21DB

Accessibility & contrast

On white

15.25

#1F1171 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#1F1171 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1171

15.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1171	#FFFFFF	#000000	##FFFFFF
##1F1171	1.00	15.25	1.38	15.25
#FFFFFF	15.25	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002974

Deuteranopia (green-blind)

#00216F

Tritanopia (blue-blind)

#002F42

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1f1171;
/* rgb */ color: rgb(31, 17, 113);
/* oklch */ color: oklch(28.3% 0.151 277.2);

Tailwind

colors: {
  custom: {
    50: '#69539b',
    500: '#1f1171',
    950: '#000000',
  },
}

SCSS

$custom: #1f1171;
$custom-light: #69539b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1171",
  "rgb": {
    "r": 31,
    "g": 17,
    "b": 113
  },
  "hsl": {
    "h": 248.75,
    "s": 73.846,
    "l": 25.49
  },
  "oklch": {
    "l": 0.28269,
    "c": 0.15101,
    "h": 277.2
  },
  "luminance": 0.01884
}

Semantic roles & 50–950 ramp

primary

#1F1171

secondary

#98A836

accent

#F137D5

background

#F6F4F9

surface

#ECE7F2

border

#C7C3CC

text

#07020E

muted

#7A787E

Preview Lab

Preview with #1F1171

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

Preview Lab → · Contrast checker → · Palette generator →