#1D228B#1D228B

#1D228B is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.5% C 0.168 H 270.9°. Best body text is #FFFFFF at 12.70:1 contrast (WCAG AA passes).

Color values

HEX	#1D228B
RGB	rgb(29, 34, 139)
HSL	hsl(237, 65%, 33%)
HSV	hsv(237, 79%, 55%)
CMYK	cmyk(79.1%, 75.5%, 0%, 45.5%)
CIE-LAB	lab(21.09, 36.27, -58.11)
CIE-LCH	lch(21.09, 68.50, 301.97°)
OKLab	oklab(33.5% 0.0027 -0.1683)
OKLCH	oklch(33.5% 0.168 270.9)
XYZ	xyz(5.7373, 3.2687, 24.7496)
Luminance	0.0327 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D228B #8B861D

analogous

#1D598B #1D228B #4F1D8B

triadic

#1D228B #8B1D22 #228B1D

tetradic

#1D228B #8B1D59 #8B861D #1D8B4F

square

#1D228B #8B1D59 #8B861D #1D8B4F

split-complementary

#1D228B #8B4F1D #598B1D

monochromatic

#080926 #121658 #1D228B #282EBE #4950D9

Accessibility & contrast

On white

12.70

#1D228B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1D228B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D228B

12.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D228B	#FFFFFF	#000000	##FFFFFF
##1D228B	1.00	12.70	1.65	12.70
#FFFFFF	12.70	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388E

Deuteranopia (green-blind)

#002D89

Tritanopia (blue-blind)

#004054

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1d228b;
/* rgb */ color: rgb(29, 34, 139);
/* oklch */ color: oklch(33.5% 0.168 270.9);

Tailwind

colors: {
  custom: {
    50: '#6e5eae',
    500: '#1d228b',
    950: '#000000',
  },
}

SCSS

$custom: #1d228b;
$custom-light: #6e5eae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d228b",
  "rgb": {
    "r": 29,
    "g": 34,
    "b": 139
  },
  "hsl": {
    "h": 237.273,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33498,
    "c": 0.16828,
    "h": 270.9
  },
  "luminance": 0.03269
}

Semantic roles & 50–950 ramp

primary

#1D228B

secondary

#BBB649

accent

#E13FE8

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1D228B

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

Preview Lab → · Contrast checker → · Palette generator →