#1F1FA9#1F1FA9

#1F1FA9 is a dark, highly saturated blue. Relative luminance 0.041; OKLCH L 36.7% C 0.207 H 270.0°. Best body text is #FFFFFF at 11.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F1FA9
RGB	rgb(31, 31, 169)
HSL	hsl(240, 69%, 39%)
HSV	hsv(240, 82%, 66%)
CMYK	cmyk(81.7%, 81.7%, 0%, 33.7%)
CIE-LAB	lab(24.11, 48.16, -71.52)
CIE-LCH	lch(24.11, 86.22, 303.96°)
OKLab	oklab(36.67% 0.0001 -0.2071)
OKLCH	oklch(36.67% 0.207 270)
XYZ	xyz(8.2141, 4.1349, 37.8936)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1FA9 #A9A91F

analogous

#1F64A9 #1F1FA9 #641FA9

triadic

#1F1FA9 #A91F1F #1FA91F

tetradic

#1F1FA9 #A91F64 #A9A91F #1FA964

square

#1F1FA9 #A91F64 #A9A91F #1FA964

split-complementary

#1F1FA9 #A9641F #64A91F

monochromatic

#0C0C42 #161675 #1F1FA9 #2D2DD8 #6060E2

Accessibility & contrast

On white

11.49

#1F1FA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1F1FA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1FA9

11.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1FA9	#FFFFFF	#000000	##FFFFFF
##1F1FA9	1.00	11.49	1.83	11.49
#FFFFFF	11.49	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0040AD

Deuteranopia (green-blind)

#0032A7

Tritanopia (blue-blind)

#004B65

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f1fa9;
/* rgb */ color: rgb(31, 31, 169);
/* oklch */ color: oklch(36.7% 0.207 270.0);

Tailwind

colors: {
  custom: {
    50: '#765ec4',
    500: '#1f1fa9',
    950: '#000000',
  },
}

SCSS

$custom: #1f1fa9;
$custom-light: #765ec4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1fa9",
  "rgb": {
    "r": 31,
    "g": 31,
    "b": 169
  },
  "hsl": {
    "h": 240,
    "s": 69,
    "l": 39.216
  },
  "oklch": {
    "l": 0.36672,
    "c": 0.20708,
    "h": 270
  },
  "luminance": 0.04136
}

Semantic roles & 50–950 ramp

primary

#1F1FA9

secondary

#C7C75D

accent

#EC3CEC

background

#F8F5FC

surface

#EFE9F8

border

#CAC5D1

text

#0A0513

muted

#7C7982

Preview Lab

Preview with #1F1FA9

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

Preview Lab → · Contrast checker → · Palette generator →