#1F1FA0#1F1FA0

#1F1FA0 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.6% C 0.196 H 270.6°. Best body text is #FFFFFF at 11.92:1 contrast (WCAG AA passes).

Color values

HEX	#1F1FA0
RGB	rgb(31, 31, 160)
HSL	hsl(240, 68%, 37%)
HSV	hsv(240, 81%, 63%)
CMYK	cmyk(80.6%, 80.6%, 0%, 37.3%)
CIE-LAB	lab(23.03, 45.26, -67.86)
CIE-LCH	lch(23.03, 81.57, 303.70°)
OKLab	oklab(35.6% 0.002 -0.1965)
OKLCH	oklch(35.6% 0.196 270.6)
XYZ	xyz(7.3981, 3.8085, 33.5961)
Luminance	0.0381 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1FA0 #A0A01F

analogous

#1F60A0 #1F1FA0 #601FA0

triadic

#1F1FA0 #A01F1F #1FA01F

tetradic

#1F1FA0 #A01F60 #A0A01F #1FA060

square

#1F1FA0 #A01F60 #A0A01F #1FA060

split-complementary

#1F1FA0 #A0601F #60A01F

monochromatic

#0B0B39 #15156D #1F1FA0 #2929D3 #5A5ADF

Accessibility & contrast

On white

11.92

#1F1FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1F1FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1FA0

11.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1FA0	#FFFFFF	#000000	##FFFFFF
##1F1FA0	1.00	11.92	1.76	11.92
#FFFFFF	11.92	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003DA4

Deuteranopia (green-blind)

#00309E

Tritanopia (blue-blind)

#004760

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f1fa0;
/* rgb */ color: rgb(31, 31, 160);
/* oklch */ color: oklch(35.6% 0.196 270.6);

Tailwind

colors: {
  custom: {
    50: '#745ebd',
    500: '#1f1fa0',
    950: '#000000',
  },
}

SCSS

$custom: #1f1fa0;
$custom-light: #745ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1fa0",
  "rgb": {
    "r": 31,
    "g": 31,
    "b": 160
  },
  "hsl": {
    "h": 240,
    "s": 67.539,
    "l": 37.451
  },
  "oklch": {
    "l": 0.35603,
    "c": 0.19648,
    "h": 270.6
  },
  "luminance": 0.03809
}

Semantic roles & 50–950 ramp

primary

#1F1FA0

secondary

#C3C358

accent

#EA3DEA

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F1FA0

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

Preview Lab → · Contrast checker → · Palette generator →