#1F2170#1F2170

#1F2170 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.6% C 0.133 H 274.2°. Best body text is #FFFFFF at 13.91:1 contrast (WCAG AA passes).

Color values

HEX	#1F2170
RGB	rgb(31, 33, 112)
HSL	hsl(239, 57%, 28%)
HSV	hsv(239, 72%, 44%)
CMYK	cmyk(72.3%, 70.5%, 0%, 56.1%)
CIE-LAB	lab(18.14, 27.25, -45.81)
CIE-LCH	lch(18.14, 53.30, 300.75°)
OKLab	oklab(30.55% 0.0096 -0.1323)
OKLCH	oklch(30.55% 0.133 274.2)
XYZ	xyz(4.0326, 2.5485, 15.6055)
Luminance	0.0255 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2170 #706E1F

analogous

#1F4970 #1F2170 #461F70

triadic

#1F2170 #701F21 #21701F

tetradic

#1F2170 #701F49 #706E1F #1F7046

square

#1F2170 #701F49 #706E1F #1F7046

split-complementary

#1F2170 #70461F #49701F

monochromatic

#070718 #121340 #1F2170 #2C2FA0 #3F43CA

Accessibility & contrast

On white

13.91

#1F2170 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1F2170 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2170

13.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2170	#FFFFFF	#000000	##FFFFFF
##1F2170	1.00	13.91	1.51	13.91
#FFFFFF	13.91	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003072

Deuteranopia (green-blind)

#00296F

Tritanopia (blue-blind)

#003645

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1f2170;
/* rgb */ color: rgb(31, 33, 112);
/* oklch */ color: oklch(30.6% 0.133 274.2);

Tailwind

colors: {
  custom: {
    50: '#675c9a',
    500: '#1f2170',
    950: '#000000',
  },
}

SCSS

$custom: #1f2170;
$custom-light: #675c9a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2170",
  "rgb": {
    "r": 31,
    "g": 33,
    "b": 112
  },
  "hsl": {
    "h": 238.519,
    "s": 56.643,
    "l": 28.039
  },
  "oklch": {
    "l": 0.30554,
    "c": 0.13268,
    "h": 274.2
  },
  "luminance": 0.02549
}

Semantic roles & 50–950 ramp

primary

#1F2170

secondary

#A4A247

accent

#DC48E0

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F2170

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

Preview Lab → · Contrast checker → · Palette generator →