#1B228F#1B228F

#1B228F is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.8% C 0.174 H 270.0°. Best body text is #FFFFFF at 12.56:1 contrast (WCAG AA passes).

Color values

HEX	#1B228F
RGB	rgb(27, 34, 143)
HSL	hsl(236, 68%, 33%)
HSV	hsv(236, 81%, 56%)
CMYK	cmyk(81.1%, 76.2%, 0%, 43.9%)
CIE-LAB	lab(21.43, 37.53, -60.04)
CIE-LCH	lch(21.43, 70.81, 302.01°)
OKLab	oklab(33.84% -0.0001 -0.1739)
OKLCH	oklch(33.84% 0.174 270)
XYZ	xyz(5.9803, 3.3596, 26.3146)
Luminance	0.0336 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B228F #8F881B

analogous

#1B5C8F #1B228F #4E1B8F

triadic

#1B228F #8F1B22 #228F1B

tetradic

#1B228F #8F1B5C #8F881B #1B8F4E

square

#1B228F #8F1B5C #8F881B #1B8F4E

split-complementary

#1B228F #8F4E1B #5C8F1B

monochromatic

#080A28 #11165C #1B228F #252EC2 #4851DC

Accessibility & contrast

On white

12.56

#1B228F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1B228F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B228F

12.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B228F	#FFFFFF	#000000	##FFFFFF
##1B228F	1.00	12.56	1.67	12.56
#FFFFFF	12.56	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003992

Deuteranopia (green-blind)

#002E8D

Tritanopia (blue-blind)

#004257

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b228f;
/* rgb */ color: rgb(27, 34, 143);
/* oklch */ color: oklch(33.8% 0.174 270.0);

Tailwind

colors: {
  custom: {
    50: '#6e5eb1',
    500: '#1b228f',
    950: '#000000',
  },
}

SCSS

$custom: #1b228f;
$custom-light: #6e5eb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b228f",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 143
  },
  "hsl": {
    "h": 236.379,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.33843,
    "c": 0.17392,
    "h": 270
  },
  "luminance": 0.0336
}

Semantic roles & 50–950 ramp

primary

#1B228F

secondary

#BEB748

accent

#E13DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1B228F

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

Preview Lab → · Contrast checker → · Palette generator →