#1D23B3#1D23B3

#1D23B3 is a dark, highly saturated blue. Relative luminance 0.047; OKLCH L 38.2% C 0.216 H 268.8°. Best body text is #FFFFFF at 10.80:1 contrast (WCAG AA passes).

Color values

HEX	#1D23B3
RGB	rgb(29, 35, 179)
HSL	hsl(238, 72%, 41%)
HSV	hsv(238, 84%, 70%)
CMYK	cmyk(83.8%, 80.4%, 0%, 29.8%)
CIE-LAB	lab(25.91, 49.26, -74.54)
CIE-LCH	lch(25.91, 89.35, 303.46°)
OKLab	oklab(38.25% -0.0047 -0.2159)
OKLCH	oklch(38.25% 0.216 268.8)
XYZ	xyz(9.2416, 4.7168, 43.0624)
Luminance	0.0472 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D23B3 #B3AD1D

analogous

#1D6EB3 #1D23B3 #621DB3

triadic

#1D23B3 #B31D23 #23B31D

tetradic

#1D23B3 #B31D6E #B3AD1D #1DB362

square

#1D23B3 #B31D6E #B3AD1D #1DB362

split-complementary

#1D23B3 #B3621D #6EB31D

monochromatic

#0C0E4A #14197E #1D23B3 #3037DD #646AE6

Accessibility & contrast

On white

10.80

#1D23B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1D23B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D23B3

10.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D23B3	#FFFFFF	#000000	##FFFFFF
##1D23B3	1.00	10.80	1.94	10.80
#FFFFFF	10.80	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045B7

Deuteranopia (green-blind)

#0035B1

Tritanopia (blue-blind)

#00506C

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d23b3;
/* rgb */ color: rgb(29, 35, 179);
/* oklch */ color: oklch(38.2% 0.216 268.8);

Tailwind

colors: {
  custom: {
    50: '#7861cb',
    500: '#1d23b3',
    950: '#000000',
  },
}

SCSS

$custom: #1d23b3;
$custom-light: #7861cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1d23b3",
  "rgb": {
    "r": 29,
    "g": 35,
    "b": 179
  },
  "hsl": {
    "h": 237.6,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.38248,
    "c": 0.21598,
    "h": 268.8
  },
  "luminance": 0.04718
}

Semantic roles & 50–950 ramp

primary

#1D23B3

secondary

#CBC761

accent

#E839EF

background

#F8F5FC

surface

#EFEAF9

border

#CAC6D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #1D23B3

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

Preview Lab → · Contrast checker → · Palette generator →