#1F1571#1F1571

#1F1571 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.8% C 0.147 H 276.6°. Best body text is #FFFFFF at 14.96:1 contrast (WCAG AA passes).

Color values

HEX	#1F1571
RGB	rgb(31, 21, 113)
HSL	hsl(247, 69%, 26%)
HSV	hsv(247, 81%, 44%)
CMYK	cmyk(72.6%, 81.4%, 0%, 55.7%)
CIE-LAB	lab(15.59, 35.00, -50.65)
CIE-LCH	lch(15.59, 61.57, 304.65°)
OKLab	oklab(28.77% 0.017 -0.1464)
OKLCH	oklch(28.77% 0.147 276.6)
XYZ	xyz(3.8129, 2.0195, 15.8085)
Luminance	0.0202 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1571 #677115

analogous

#153971 #1F1571 #4D1571

triadic

#1F1571 #711F15 #15711F

tetradic

#1F1571 #711539 #677115 #15714D

square

#1F1571 #711539 #677115 #15714D

split-complementary

#1F1571 #714D15 #397115

monochromatic

#07051A #110B3D #1F1571 #2D1FA5 #3C29D7

Accessibility & contrast

On white

14.96

#1F1571 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#1F1571 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1571

14.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1571	#FFFFFF	#000000	##FFFFFF
##1F1571	1.00	14.96	1.40	14.96
#FFFFFF	14.96	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	14.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B74

Deuteranopia (green-blind)

#00236F

Tritanopia (blue-blind)

#003143

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #1f1571;
/* rgb */ color: rgb(31, 21, 113);
/* oklch */ color: oklch(28.8% 0.147 276.6);

Tailwind

colors: {
  custom: {
    50: '#69559b',
    500: '#1f1571',
    950: '#000000',
  },
}

SCSS

$custom: #1f1571;
$custom-light: #69559b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1571",
  "rgb": {
    "r": 31,
    "g": 21,
    "b": 113
  },
  "hsl": {
    "h": 246.522,
    "s": 68.657,
    "l": 26.275
  },
  "oklch": {
    "l": 0.28772,
    "c": 0.14739,
    "h": 276.6
  },
  "luminance": 0.0202
}

Semantic roles & 50–950 ramp

primary

#1F1571

secondary

#9BA73B

accent

#EB3CD8

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1F1571

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

Preview Lab → · Contrast checker → · Palette generator →