#1F157B#1F157B

#1F157B is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.0% C 0.160 H 275.1°. Best body text is #FFFFFF at 14.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F157B
RGB	rgb(31, 21, 123)
HSL	hsl(246, 71%, 28%)
HSV	hsv(246, 83%, 48%)
CMYK	cmyk(74.8%, 82.9%, 0%, 51.8%)
CIE-LAB	lab(16.78, 38.32, -55.12)
CIE-LCH	lch(16.78, 67.13, 304.81°)
OKLab	oklab(29.96% 0.0143 -0.1594)
OKLCH	oklch(29.96% 0.16 275.1)
XYZ	xyz(4.4072, 2.2573, 18.9385)
Luminance	0.0226 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F157B #717B15

analogous

#153E7B #1F157B #52157B

triadic

#1F157B #7B1F15 #157B1F

tetradic

#1F157B #7B153E #717B15 #157B52

square

#1F157B #7B153E #717B15 #157B52

split-complementary

#1F157B #7B5215 #3E7B15

monochromatic

#07041A #120C47 #1F157B #2C1EAF #402FDB

Accessibility & contrast

On white

14.47

#1F157B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#1F157B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F157B

14.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F157B	#FFFFFF	#000000	##FFFFFF
##1F157B	1.00	14.47	1.45	14.47
#FFFFFF	14.47	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E7E

Deuteranopia (green-blind)

#002579

Tritanopia (blue-blind)

#003548

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1f157b;
/* rgb */ color: rgb(31, 21, 123);
/* oklch */ color: oklch(30.0% 0.160 275.1);

Tailwind

colors: {
  custom: {
    50: '#6b55a2',
    500: '#1f157b',
    950: '#000000',
  },
}

SCSS

$custom: #1f157b;
$custom-light: #6b55a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f157b",
  "rgb": {
    "r": 31,
    "g": 21,
    "b": 123
  },
  "hsl": {
    "h": 245.882,
    "s": 70.833,
    "l": 28.235
  },
  "oklch": {
    "l": 0.29955,
    "c": 0.16002,
    "h": 275.1
  },
  "luminance": 0.02258
}

Semantic roles & 50–950 ramp

primary

#1F157B

secondary

#A5B03B

accent

#EE3ADC

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1F157B

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

Preview Lab → · Contrast checker → · Palette generator →