#1F2970#1F2970

#1F2970 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.1% C 0.122 H 271.5°. Best body text is #FFFFFF at 13.05:1 contrast (WCAG AA passes).

Color values

HEX	#1F2970
RGB	rgb(31, 41, 112)
HSL	hsl(233, 57%, 28%)
HSV	hsv(233, 72%, 44%)
CMYK	cmyk(72.3%, 63.4%, 0%, 56.1%)
CIE-LAB	lab(20.23, 21.75, -42.39)
CIE-LCH	lch(20.23, 47.64, 297.16°)
OKLab	oklab(32.09% 0.0032 -0.1222)
OKLCH	oklch(32.09% 0.122 271.5)
XYZ	xyz(4.2817, 3.0466, 15.6885)
Luminance	0.0305 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2970 #70661F

analogous

#1F5170 #1F2970 #3E1F70

triadic

#1F2970 #701F29 #29701F

tetradic

#1F2970 #701F51 #70661F #1F703E

square

#1F2970 #701F51 #70661F #1F703E

split-complementary

#1F2970 #703E1F #51701F

monochromatic

#070918 #121740 #1F2970 #2C3BA0 #3F51CA

Accessibility & contrast

On white

13.05

#1F2970 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1F2970 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2970

13.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2970	#FFFFFF	#000000	##FFFFFF
##1F2970	1.00	13.05	1.61	13.05
#FFFFFF	13.05	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003572

Deuteranopia (green-blind)

#002D6F

Tritanopia (blue-blind)

#003B48

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f2970;
/* rgb */ color: rgb(31, 41, 112);
/* oklch */ color: oklch(32.1% 0.122 271.5);

Tailwind

colors: {
  custom: {
    50: '#67629a',
    500: '#1f2970',
    950: '#000000',
  },
}

SCSS

$custom: #1f2970;
$custom-light: #67629a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2970",
  "rgb": {
    "r": 31,
    "g": 41,
    "b": 112
  },
  "hsl": {
    "h": 232.593,
    "s": 56.643,
    "l": 28.039
  },
  "oklch": {
    "l": 0.32088,
    "c": 0.12228,
    "h": 271.5
  },
  "luminance": 0.03047
}

Semantic roles & 50–950 ramp

primary

#1F2970

secondary

#A49847

accent

#CD48E0

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1F2970

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

Preview Lab → · Contrast checker → · Palette generator →