#1D21B3#1D21B3

#1D21B3 is a dark, highly saturated blue. Relative luminance 0.046; OKLCH L 38.0% C 0.218 H 268.9°. Best body text is #FFFFFF at 10.93:1 contrast (WCAG AA passes).

Color values

HEX	#1D21B3
RGB	rgb(29, 33, 179)
HSL	hsl(238, 72%, 41%)
HSV	hsv(238, 84%, 70%)
CMYK	cmyk(83.8%, 81.6%, 0%, 29.8%)
CIE-LAB	lab(25.57, 50.26, -75.11)
CIE-LCH	lch(25.57, 90.37, 303.79°)
OKLab	oklab(38.01% -0.0043 -0.2175)
OKLCH	oklch(38.01% 0.218 268.9)
XYZ	xyz(9.1845, 4.6025, 43.0434)
Luminance	0.0460 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D21B3 #B3AF1D

analogous

#1D6CB3 #1D21B3 #641DB3

triadic

#1D21B3 #B31D21 #21B31D

tetradic

#1D21B3 #B31D6C #B3AF1D #1DB364

square

#1D21B3 #B31D6C #B3AF1D #1DB364

split-complementary

#1D21B3 #B3641D #6CB31D

monochromatic

#0C0E4A #14177E #1D21B3 #3034DD #6468E6

Accessibility & contrast

On white

10.93

#1D21B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1D21B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D21B3

10.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D21B3	#FFFFFF	#000000	##FFFFFF
##1D21B3	1.00	10.93	1.92	10.93
#FFFFFF	10.93	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B7

Deuteranopia (green-blind)

#0035B1

Tritanopia (blue-blind)

#00506B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d21b3;
/* rgb */ color: rgb(29, 33, 179);
/* oklch */ color: oklch(38.0% 0.218 268.9);

Tailwind

colors: {
  custom: {
    50: '#7860cb',
    500: '#1d21b3',
    950: '#000000',
  },
}

SCSS

$custom: #1d21b3;
$custom-light: #7860cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1d21b3",
  "rgb": {
    "r": 29,
    "g": 33,
    "b": 179
  },
  "hsl": {
    "h": 238.4,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.3801,
    "c": 0.21757,
    "h": 268.9
  },
  "luminance": 0.04604
}

Semantic roles & 50–950 ramp

primary

#1D21B3

secondary

#CBC861

accent

#EA39EF

background

#F8F5FC

surface

#EFEAF9

border

#CAC6D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #1D21B3

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

Preview Lab → · Contrast checker → · Palette generator →