#1B238C#1B238C

#1B238C is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.7% C 0.169 H 270.0°. Best body text is #FFFFFF at 12.61:1 contrast (WCAG AA passes).

Color values

HEX	#1B238C
RGB	rgb(27, 35, 140)
HSL	hsl(236, 68%, 33%)
HSV	hsv(236, 81%, 55%)
CMYK	cmyk(80.7%, 75%, 0%, 45.1%)
CIE-LAB	lab(21.31, 35.85, -58.37)
CIE-LCH	lch(21.31, 68.50, 301.56°)
OKLab	oklab(33.66% -0.0001 -0.1691)
OKLCH	oklch(33.66% 0.169 270)
XYZ	xyz(5.7850, 3.3279, 25.1433)
Luminance	0.0333 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B238C #8C841B

analogous

#1B5C8C #1B238C #4B1B8C

triadic

#1B238C #8C1B23 #238C1B

tetradic

#1B238C #8C1B5C #8C841B #1B8C4B

square

#1B238C #8C1B5C #8C841B #1B8C4B

split-complementary

#1B238C #8C4B1B #5C8C1B

monochromatic

#070925 #111659 #1B238C #2530BF #4651DB

Accessibility & contrast

On white

12.61

#1B238C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1B238C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B238C

12.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B238C	#FFFFFF	#000000	##FFFFFF
##1B238C	1.00	12.61	1.67	12.61
#FFFFFF	12.61	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00398F

Deuteranopia (green-blind)

#002E8A

Tritanopia (blue-blind)

#004155

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b238c;
/* rgb */ color: rgb(27, 35, 140);
/* oklch */ color: oklch(33.7% 0.169 270.0);

Tailwind

colors: {
  custom: {
    50: '#6d5faf',
    500: '#1b238c',
    950: '#000000',
  },
}

SCSS

$custom: #1b238c;
$custom-light: #6d5faf;
$custom-dark: #000000;

JSON

{
  "hex": "#1b238c",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 140
  },
  "hsl": {
    "h": 235.752,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.3366,
    "c": 0.16907,
    "h": 270
  },
  "luminance": 0.03329
}

Semantic roles & 50–950 ramp

primary

#1B238C

secondary

#BDB446

accent

#DE3DEB

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B238C

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

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