#1B20B3#1B20B3

#1B20B3 is a dark, highly saturated blue. Relative luminance 0.045; OKLCH L 37.8% C 0.219 H 268.4°. Best body text is #FFFFFF at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#1B20B3
RGB	rgb(27, 32, 179)
HSL	hsl(238, 74%, 40%)
HSV	hsv(238, 85%, 70%)
CMYK	cmyk(84.9%, 82.1%, 0%, 29.8%)
CIE-LAB	lab(25.32, 50.66, -75.53)
CIE-LCH	lch(25.32, 90.94, 303.85°)
OKLab	oklab(37.81% -0.006 -0.2187)
OKLCH	oklch(37.81% 0.219 268.4)
XYZ	xyz(9.1024, 4.5196, 43.0317)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B20B3 #B3AE1B

analogous

#1B6CB3 #1B20B3 #621BB3

triadic

#1B20B3 #B31B20 #20B31B

tetradic

#1B20B3 #B31B6C #B3AE1B #1BB362

square

#1B20B3 #B31B6C #B3AE1B #1BB362

split-complementary

#1B20B3 #B3621B #6CB31B

monochromatic

#0B0D49 #13167E #1B20B3 #2C32DF #6166E7

Accessibility & contrast

On white

11.03

#1B20B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1B20B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B20B3

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B20B3	#FFFFFF	#000000	##FFFFFF
##1B20B3	1.00	11.03	1.90	11.03
#FFFFFF	11.03	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B7

Deuteranopia (green-blind)

#0034B1

Tritanopia (blue-blind)

#004F6B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b20b3;
/* rgb */ color: rgb(27, 32, 179);
/* oklch */ color: oklch(37.8% 0.219 268.4);

Tailwind

colors: {
  custom: {
    50: '#785fcb',
    500: '#1b20b3',
    950: '#000000',
  },
}

SCSS

$custom: #1b20b3;
$custom-light: #785fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b20b3",
  "rgb": {
    "r": 27,
    "g": 32,
    "b": 179
  },
  "hsl": {
    "h": 238.026,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.37811,
    "c": 0.21883,
    "h": 268.4
  },
  "luminance": 0.04521
}

Semantic roles & 50–950 ramp

primary

#1B20B3

secondary

#CCC85E

accent

#EA37F0

background

#F8F5FC

surface

#EFEAF9

border

#CAC6D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #1B20B3

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

Preview Lab → · Contrast checker → · Palette generator →