#1D1F8B#1D1F8B

#1D1F8B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.1% C 0.171 H 271.3°. Best body text is #FFFFFF at 12.95:1 contrast (WCAG AA passes).

Color values

HEX	#1D1F8B
RGB	rgb(29, 31, 139)
HSL	hsl(239, 65%, 33%)
HSV	hsv(239, 79%, 55%)
CMYK	cmyk(79.1%, 77.7%, 0%, 45.5%)
CIE-LAB	lab(20.46, 38.05, -59.15)
CIE-LCH	lch(20.46, 70.34, 302.75°)
OKLab	oklab(33.05% 0.0039 -0.1713)
OKLCH	oklch(33.05% 0.171 271.3)
XYZ	xyz(5.6553, 3.1046, 24.7223)
Luminance	0.0311 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D1F8B #8B891D

analogous

#1D568B #1D1F8B #521D8B

triadic

#1D1F8B #8B1D1F #1F8B1D

tetradic

#1D1F8B #8B1D56 #8B891D #1D8B52

square

#1D1F8B #8B1D56 #8B891D #1D8B52

split-complementary

#1D1F8B #8B521D #568B1D

monochromatic

#080826 #121458 #1D1F8B #282ABE #494CD9

Accessibility & contrast

On white

12.95

#1D1F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1D1F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D1F8B

12.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D1F8B	#FFFFFF	#000000	##FFFFFF
##1D1F8B	1.00	12.95	1.62	12.95
#FFFFFF	12.95	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00378E

Deuteranopia (green-blind)

#002C89

Tritanopia (blue-blind)

#003F54

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1d1f8b;
/* rgb */ color: rgb(29, 31, 139);
/* oklch */ color: oklch(33.1% 0.171 271.3);

Tailwind

colors: {
  custom: {
    50: '#6e5cae',
    500: '#1d1f8b',
    950: '#000000',
  },
}

SCSS

$custom: #1d1f8b;
$custom-light: #6e5cae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d1f8b",
  "rgb": {
    "r": 29,
    "g": 31,
    "b": 139
  },
  "hsl": {
    "h": 238.909,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.3305,
    "c": 0.17131,
    "h": 271.3
  },
  "luminance": 0.03105
}

Semantic roles & 50–950 ramp

primary

#1D1F8B

secondary

#BBB949

accent

#E53FE8

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080410

muted

#7B797F

Preview Lab

Preview with #1D1F8B

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

Preview Lab → · Contrast checker → · Palette generator →