#1B227C#1B227C

#1B227C is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.7% C 0.149 H 271.0°. Best body text is #FFFFFF at 13.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B227C
RGB	rgb(27, 34, 124)
HSL	hsl(236, 64%, 30%)
HSV	hsv(236, 78%, 49%)
CMYK	cmyk(78.2%, 72.6%, 0%, 51.4%)
CIE-LAB	lab(19.36, 30.61, -51.51)
CIE-LCH	lch(19.36, 59.92, 300.72°)
OKLab	oklab(31.74% 0.0027 -0.1491)
OKLCH	oklch(31.74% 0.149 271)
XYZ	xyz(4.6609, 2.8318, 19.3658)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B227C #7C751B

analogous

#1B537C #1B227C #451B7C

triadic

#1B227C #7C1B22 #227C1B

tetradic

#1B227C #7C1B53 #7C751B #1B7C45

square

#1B227C #7C1B53 #7C751B #1B7C45

split-complementary

#1B227C #7C451B #537C1B

monochromatic

#050719 #10144A #1B227C #2630AE #3D48D5

Accessibility & contrast

On white

13.41

#1B227C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1B227C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B227C

13.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B227C	#FFFFFF	#000000	##FFFFFF
##1B227C	1.00	13.41	1.57	13.41
#FFFFFF	13.41	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347F

Deuteranopia (green-blind)

#002A7A

Tritanopia (blue-blind)

#003B4C

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b227c;
/* rgb */ color: rgb(27, 34, 124);
/* oklch */ color: oklch(31.7% 0.149 271.0);

Tailwind

colors: {
  custom: {
    50: '#695da3',
    500: '#1b227c',
    950: '#000000',
  },
}

SCSS

$custom: #1b227c;
$custom-light: #695da3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b227c",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 124
  },
  "hsl": {
    "h": 235.67,
    "s": 64.238,
    "l": 29.608
  },
  "oklch": {
    "l": 0.31742,
    "c": 0.14912,
    "h": 271
  },
  "luminance": 0.02832
}

Semantic roles & 50–950 ramp

primary

#1B227C

secondary

#B0A843

accent

#DB41E7

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B227C

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

Preview Lab → · Contrast checker → · Palette generator →