#1F1DAA#1F1DAA

#1F1DAA is a dark, highly saturated blue. Relative luminance 0.041; OKLCH L 36.6% C 0.210 H 270.1°. Best body text is #FFFFFF at 11.57:1 contrast (WCAG AA passes).

Color values

HEX	#1F1DAA
RGB	rgb(31, 29, 170)
HSL	hsl(241, 71%, 39%)
HSV	hsv(241, 83%, 67%)
CMYK	cmyk(81.8%, 82.9%, 0%, 33.3%)
CIE-LAB	lab(23.91, 49.44, -72.47)
CIE-LCH	lch(23.91, 87.73, 304.30°)
OKLab	oklab(36.56% 0.0003 -0.2098)
OKLCH	oklch(36.56% 0.21 270.1)
XYZ	xyz(8.2577, 4.0714, 38.3730)
Luminance	0.0407 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1DAA #A8AA1D

analogous

#1D62AA #1F1DAA #661DAA

triadic

#1F1DAA #AA1F1D #1DAA1F

tetradic

#1F1DAA #AA1D62 #A8AA1D #1DAA66

square

#1F1DAA #AA1D62 #A8AA1D #1DAA66

split-complementary

#1F1DAA #AA661D #62AA1D

monochromatic

#0C0B41 #151476 #1F1DAA #2C2ADB #605EE4

Accessibility & contrast

On white

11.57

#1F1DAA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1F1DAA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1DAA

11.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1DAA	#FFFFFF	#000000	##FFFFFF
##1F1DAA	1.00	11.57	1.81	11.57
#FFFFFF	11.57	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0040AE

Deuteranopia (green-blind)

#0031A8

Tritanopia (blue-blind)

#004B65

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f1daa;
/* rgb */ color: rgb(31, 29, 170);
/* oklch */ color: oklch(36.6% 0.210 270.1);

Tailwind

colors: {
  custom: {
    50: '#775dc5',
    500: '#1f1daa',
    950: '#000000',
  },
}

SCSS

$custom: #1f1daa;
$custom-light: #775dc5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1daa",
  "rgb": {
    "r": 31,
    "g": 29,
    "b": 170
  },
  "hsl": {
    "h": 240.851,
    "s": 70.854,
    "l": 39.02
  },
  "oklch": {
    "l": 0.36563,
    "c": 0.20978,
    "h": 270.1
  },
  "luminance": 0.04072
}

Semantic roles & 50–950 ramp

primary

#1F1DAA

secondary

#C6C85B

accent

#EE3AEB

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0B0413

muted

#7C7982

Preview Lab

Preview with #1F1DAA

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

Preview Lab → · Contrast checker → · Palette generator →