#1D238F#1D238F

#1D238F is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.1% C 0.172 H 270.5°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#1D238F
RGB	rgb(29, 35, 143)
HSL	hsl(237, 66%, 34%)
HSV	hsv(237, 80%, 56%)
CMYK	cmyk(79.7%, 75.5%, 0%, 43.9%)
CIE-LAB	lab(21.75, 37.09, -59.52)
CIE-LCH	lch(21.75, 70.13, 301.93°)
OKLab	oklab(34.1% 0.0016 -0.1724)
OKLCH	oklch(34.1% 0.172 270.5)
XYZ	xyz(6.0640, 3.4458, 26.3268)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D238F #8F891D

analogous

#1D5C8F #1D238F #501D8F

triadic

#1D238F #8F1D23 #238F1D

tetradic

#1D238F #8F1D5C #8F891D #1D8F50

square

#1D238F #8F1D5C #8F891D #1D8F50

split-complementary

#1D238F #8F501D #5C8F1D

monochromatic

#080A29 #13175C #1D238F #272FC2 #4C53DB

Accessibility & contrast

On white

12.43

#1D238F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1D238F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D238F

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D238F	#FFFFFF	#000000	##FFFFFF
##1D238F	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A92

Deuteranopia (green-blind)

#002E8D

Tritanopia (blue-blind)

#004257

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1d238f;
/* rgb */ color: rgb(29, 35, 143);
/* oklch */ color: oklch(34.1% 0.172 270.5);

Tailwind

colors: {
  custom: {
    50: '#6f5fb1',
    500: '#1d238f',
    950: '#000000',
  },
}

SCSS

$custom: #1d238f;
$custom-light: #6f5fb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d238f",
  "rgb": {
    "r": 29,
    "g": 35,
    "b": 143
  },
  "hsl": {
    "h": 236.842,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.34097,
    "c": 0.17237,
    "h": 270.5
  },
  "luminance": 0.03446
}

Semantic roles & 50–950 ramp

primary

#1D238F

secondary

#BDB74B

accent

#E03FE9

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1D238F

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

Preview Lab → · Contrast checker → · Palette generator →