#1F1DA1#1F1DA1

#1F1DA1 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.5% C 0.199 H 270.7°. Best body text is #FFFFFF at 12.01:1 contrast (WCAG AA passes).

Color values

HEX	#1F1DA1
RGB	rgb(31, 29, 161)
HSL	hsl(241, 69%, 37%)
HSV	hsv(241, 82%, 63%)
CMYK	cmyk(80.7%, 82%, 0%, 36.9%)
CIE-LAB	lab(22.80, 46.60, -68.84)
CIE-LCH	lch(22.80, 83.13, 304.09°)
OKLab	oklab(35.48% 0.0023 -0.1993)
OKLCH	oklch(35.48% 0.199 270.7)
XYZ	xyz(7.4353, 3.7424, 34.0418)
Luminance	0.0374 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1DA1 #9FA11D

analogous

#1D5DA1 #1F1DA1 #611DA1

triadic

#1F1DA1 #A11F1D #1DA11F

tetradic

#1F1DA1 #A11D5D #9FA11D #1DA161

square

#1F1DA1 #A11D5D #9FA11D #1DA161

split-complementary

#1F1DA1 #A1611D #5DA11D

monochromatic

#0B0A39 #15146D #1F1DA1 #2926D5 #5A58E1

Accessibility & contrast

On white

12.01

#1F1DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1F1DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1DA1

12.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1DA1	#FFFFFF	#000000	##FFFFFF
##1F1DA1	1.00	12.01	1.75	12.01
#FFFFFF	12.01	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA5

Deuteranopia (green-blind)

#00309F

Tritanopia (blue-blind)

#004760

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f1da1;
/* rgb */ color: rgb(31, 29, 161);
/* oklch */ color: oklch(35.5% 0.199 270.7);

Tailwind

colors: {
  custom: {
    50: '#745dbe',
    500: '#1f1da1',
    950: '#000000',
  },
}

SCSS

$custom: #1f1da1;
$custom-light: #745dbe;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1da1",
  "rgb": {
    "r": 31,
    "g": 29,
    "b": 161
  },
  "hsl": {
    "h": 240.909,
    "s": 69.474,
    "l": 37.255
  },
  "oklch": {
    "l": 0.35479,
    "c": 0.19931,
    "h": 270.7
  },
  "luminance": 0.03743
}

Semantic roles & 50–950 ramp

primary

#1F1DA1

secondary

#C3C455

accent

#EC3CEA

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F1DA1

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

Preview Lab → · Contrast checker → · Palette generator →