#1F2779#1F2779

#1F2779 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.6% C 0.138 H 271.8°. Best body text is #FFFFFF at 12.93:1 contrast (WCAG AA passes).

Color values

HEX	#1F2779
RGB	rgb(31, 39, 121)
HSL	hsl(235, 59%, 30%)
HSV	hsv(235, 74%, 47%)
CMYK	cmyk(74.4%, 67.8%, 0%, 52.5%)
CIE-LAB	lab(20.53, 26.60, -47.67)
CIE-LCH	lch(20.53, 54.59, 299.17°)
OKLab	oklab(32.56% 0.0044 -0.1378)
OKLCH	oklch(32.56% 0.138 271.8)
XYZ	xyz(4.7406, 3.1223, 18.4383)
Luminance	0.0312 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2779 #79711F

analogous

#1F5479 #1F2779 #441F79

triadic

#1F2779 #791F27 #27791F

tetradic

#1F2779 #791F54 #79711F #1F7944

square

#1F2779 #791F54 #79711F #1F7944

split-complementary

#1F2779 #79441F #54791F

monochromatic

#060818 #131748 #1F2779 #2B37AA #4350CF

Accessibility & contrast

On white

12.93

#1F2779 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1F2779 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2779

12.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2779	#FFFFFF	#000000	##FFFFFF
##1F2779	1.00	12.93	1.62	12.93
#FFFFFF	12.93	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367C

Deuteranopia (green-blind)

#002D77

Tritanopia (blue-blind)

#003D4C

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f2779;
/* rgb */ color: rgb(31, 39, 121);
/* oklch */ color: oklch(32.6% 0.138 271.8);

Tailwind

colors: {
  custom: {
    50: '#6961a1',
    500: '#1f2779',
    950: '#000000',
  },
}

SCSS

$custom: #1f2779;
$custom-light: #6961a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2779",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 121
  },
  "hsl": {
    "h": 234.667,
    "s": 59.211,
    "l": 29.804
  },
  "oklch": {
    "l": 0.32563,
    "c": 0.13783,
    "h": 271.8
  },
  "luminance": 0.03123
}

Semantic roles & 50–950 ramp

primary

#1F2779

secondary

#ACA347

accent

#D445E2

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F2779

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

Preview Lab → · Contrast checker → · Palette generator →