#1D128A#1D128A

#1D128A is a dark, vivid blue. Relative luminance 0.025; OKLCH L 31.3% C 0.181 H 272.6°. Best body text is #FFFFFF at 13.95:1 contrast (WCAG AA passes).

Color values

HEX	#1D128A
RGB	rgb(29, 18, 138)
HSL	hsl(246, 77%, 31%)
HSV	hsv(246, 87%, 54%)
CMYK	cmyk(79%, 87%, 0%, 45.9%)
CIE-LAB	lab(18.05, 44.38, -62.53)
CIE-LCH	lch(18.05, 76.68, 305.37°)
OKLab	oklab(31.33% 0.0082 -0.1808)
OKLCH	oklch(31.33% 0.181 272.6)
XYZ	xyz(5.3089, 2.5282, 24.2480)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D128A #7F8A12

analogous

#12438A #1D128A #59128A

triadic

#1D128A #8A1D12 #128A1D

tetradic

#1D128A #8A1243 #7F8A12 #128A59

square

#1D128A #8A1243 #7F8A12 #128A59

split-complementary

#1D128A #8A5912 #438A12

monochromatic

#06041E #120B54 #1D128A #2819C0 #4232E4

Accessibility & contrast

On white

13.95

#1D128A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1D128A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D128A

13.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D128A	#FFFFFF	#000000	##FFFFFF
##1D128A	1.00	13.95	1.51	13.95
#FFFFFF	13.95	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00328D

Deuteranopia (green-blind)

#002688

Tritanopia (blue-blind)

#003A51

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1d128a;
/* rgb */ color: rgb(29, 18, 138);
/* oklch */ color: oklch(31.3% 0.181 272.6);

Tailwind

colors: {
  custom: {
    50: '#6f55ae',
    500: '#1d128a',
    950: '#000000',
  },
}

SCSS

$custom: #1d128a;
$custom-light: #6f55ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d128a",
  "rgb": {
    "r": 29,
    "g": 18,
    "b": 138
  },
  "hsl": {
    "h": 245.5,
    "s": 76.923,
    "l": 30.588
  },
  "oklch": {
    "l": 0.31333,
    "c": 0.18102,
    "h": 272.6
  },
  "luminance": 0.02529
}

Semantic roles & 50–950 ramp

primary

#1D128A

secondary

#B2BF39

accent

#F334E2

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1D128A

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

Preview Lab → · Contrast checker → · Palette generator →