#1D238B#1D238B

#1D238B is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.7% C 0.167 H 270.8°. Best body text is #FFFFFF at 12.61:1 contrast (WCAG AA passes).

Color values

HEX	#1D238B
RGB	rgb(29, 35, 139)
HSL	hsl(237, 65%, 33%)
HSV	hsv(237, 79%, 55%)
CMYK	cmyk(79.1%, 74.8%, 0%, 45.5%)
CIE-LAB	lab(21.31, 35.66, -57.75)
CIE-LCH	lch(21.31, 67.87, 301.69°)
OKLab	oklab(33.65% 0.0022 -0.1672)
OKLCH	oklch(33.65% 0.167 270.8)
XYZ	xyz(5.7663, 3.3267, 24.7593)
Luminance	0.0333 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D238B #8B851D

analogous

#1D5A8B #1D238B #4E1D8B

triadic

#1D238B #8B1D23 #238B1D

tetradic

#1D238B #8B1D5A #8B851D #1D8B4E

square

#1D238B #8B1D5A #8B851D #1D8B4E

split-complementary

#1D238B #8B4E1D #5A8B1D

monochromatic

#080926 #121658 #1D238B #2830BE #4951D9

Accessibility & contrast

On white

12.61

#1D238B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1D238B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D238B

12.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D238B	#FFFFFF	#000000	##FFFFFF
##1D238B	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)

#00398E

Deuteranopia (green-blind)

#002E89

Tritanopia (blue-blind)

#004155

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1d238b;
/* rgb */ color: rgb(29, 35, 139);
/* oklch */ color: oklch(33.7% 0.167 270.8);

Tailwind

colors: {
  custom: {
    50: '#6d5fae',
    500: '#1d238b',
    950: '#000000',
  },
}

SCSS

$custom: #1d238b;
$custom-light: #6d5fae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d238b",
  "rgb": {
    "r": 29,
    "g": 35,
    "b": 139
  },
  "hsl": {
    "h": 236.727,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33653,
    "c": 0.16724,
    "h": 270.8
  },
  "luminance": 0.03327
}

Semantic roles & 50–950 ramp

primary

#1D238B

secondary

#BBB549

accent

#DF3FE8

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1D238B

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

Preview Lab → · Contrast checker → · Palette generator →