#1B157E#1B157E

#1B157E is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.0% C 0.165 H 272.8°. Best body text is #FFFFFF at 14.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B157E
RGB	rgb(27, 21, 126)
HSL	hsl(243, 71%, 29%)
HSV	hsv(243, 83%, 49%)
CMYK	cmyk(78.6%, 83.3%, 0%, 50.6%)
CIE-LAB	lab(16.87, 39.00, -56.90)
CIE-LCH	lch(16.87, 68.98, 304.43°)
OKLab	oklab(30.05% 0.008 -0.1646)
OKLCH	oklch(30.05% 0.165 272.8)
XYZ	xyz(4.4848, 2.2752, 19.9374)
Luminance	0.0228 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B157E #787E15

analogous

#15447E #1B157E #50157E

triadic

#1B157E #7E1B15 #157E1B

tetradic

#1B157E #7E1544 #787E15 #157E50

square

#1B157E #7E1544 #787E15 #157E50

split-complementary

#1B157E #7E5015 #447E15

monochromatic

#06041A #100C4A #1B157E #261EB2 #3B31DD

Accessibility & contrast

On white

14.43

#1B157E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#1B157E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B157E

14.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B157E	#FFFFFF	#000000	##FFFFFF
##1B157E	1.00	14.43	1.46	14.43
#FFFFFF	14.43	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E81

Deuteranopia (green-blind)

#00247C

Tritanopia (blue-blind)

#00364A

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1b157e;
/* rgb */ color: rgb(27, 21, 126);
/* oklch */ color: oklch(30.0% 0.165 272.8);

Tailwind

colors: {
  custom: {
    50: '#6b55a5',
    500: '#1b157e',
    950: '#000000',
  },
}

SCSS

$custom: #1b157e;
$custom-light: #6b55a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b157e",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 126
  },
  "hsl": {
    "h": 243.429,
    "s": 71.429,
    "l": 28.824
  },
  "oklch": {
    "l": 0.30048,
    "c": 0.16482,
    "h": 272.8
  },
  "luminance": 0.02276
}

Semantic roles & 50–950 ramp

primary

#1B157E

secondary

#ACB33C

accent

#EE3AE4

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1B157E

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

Preview Lab → · Contrast checker → · Palette generator →