#1F187A#1F187A

#1F187A is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.2% C 0.156 H 274.8°. Best body text is #FFFFFF at 14.29:1 contrast (WCAG AA passes).

Color values

HEX	#1F187A
RGB	rgb(31, 24, 122)
HSL	hsl(244, 67%, 29%)
HSV	hsv(244, 80%, 48%)
CMYK	cmyk(74.6%, 80.3%, 0%, 52.2%)
CIE-LAB	lab(17.22, 36.38, -53.75)
CIE-LCH	lch(17.22, 64.90, 304.09°)
OKLab	oklab(30.23% 0.0132 -0.1554)
OKLCH	oklch(30.23% 0.156 274.8)
XYZ	xyz(4.4034, 2.3493, 18.6300)
Luminance	0.0235 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F187A #737A18

analogous

#18427A #1F187A #50187A

triadic

#1F187A #7A1F18 #187A1F

tetradic

#1F187A #7A1842 #737A18 #187A50

square

#1F187A #7A1842 #737A18 #187A50

split-complementary

#1F187A #7A5018 #427A18

monochromatic

#06051A #120E47 #1F187A #2C22AD #4135D7

Accessibility & contrast

On white

14.29

#1F187A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1F187A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F187A

14.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F187A	#FFFFFF	#000000	##FFFFFF
##1F187A	1.00	14.29	1.47	14.29
#FFFFFF	14.29	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7D

Deuteranopia (green-blind)

#002678

Tritanopia (blue-blind)

#003548

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1f187a;
/* rgb */ color: rgb(31, 24, 122);
/* oklch */ color: oklch(30.2% 0.156 274.8);

Tailwind

colors: {
  custom: {
    50: '#6b57a2',
    500: '#1f187a',
    950: '#000000',
  },
}

SCSS

$custom: #1f187a;
$custom-light: #6b57a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f187a",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 122
  },
  "hsl": {
    "h": 244.286,
    "s": 67.123,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30227,
    "c": 0.15601,
    "h": 274.8
  },
  "luminance": 0.0235
}

Semantic roles & 50–950 ramp

primary

#1F187A

secondary

#A7AF3F

accent

#EA3EDE

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1F187A

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

Preview Lab → · Contrast checker → · Palette generator →