#1D128E#1D128E

#1D128E is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.8% C 0.186 H 272.2°. Best body text is #FFFFFF at 13.73:1 contrast (WCAG AA passes).

Color values

HEX	#1D128E
RGB	rgb(29, 18, 142)
HSL	hsl(245, 78%, 31%)
HSV	hsv(245, 87%, 56%)
CMYK	cmyk(79.6%, 87.3%, 0%, 44.3%)
CIE-LAB	lab(18.57, 45.61, -64.16)
CIE-LCH	lch(18.57, 78.72, 305.41°)
OKLab	oklab(31.84% 0.0071 -0.1856)
OKLCH	oklch(31.84% 0.186 272.2)
XYZ	xyz(5.6039, 2.6462, 25.8014)
Luminance	0.0265 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D128E #838E12

analogous

#12458E #1D128E #5B128E

triadic

#1D128E #8E1D12 #128E1D

tetradic

#1D128E #8E1245 #838E12 #128E5B

square

#1D128E #8E1245 #838E12 #128E5B

split-complementary

#1D128E #8E5B12 #458E12

monochromatic

#070421 #120B58 #1D128E #2819C4 #4535E5

Accessibility & contrast

On white

13.73

#1D128E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1D128E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D128E

13.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D128E	#FFFFFF	#000000	##FFFFFF
##1D128E	1.00	13.73	1.53	13.73
#FFFFFF	13.73	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003391

Deuteranopia (green-blind)

#00278C

Tritanopia (blue-blind)

#003C53

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1d128e;
/* rgb */ color: rgb(29, 18, 142);
/* oklch */ color: oklch(31.8% 0.186 272.2);

Tailwind

colors: {
  custom: {
    50: '#7055b0',
    500: '#1d128e',
    950: '#000000',
  },
}

SCSS

$custom: #1d128e;
$custom-light: #7055b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d128e",
  "rgb": {
    "r": 29,
    "g": 18,
    "b": 142
  },
  "hsl": {
    "h": 245.323,
    "s": 77.5,
    "l": 31.373
  },
  "oklch": {
    "l": 0.31839,
    "c": 0.18571,
    "h": 272.2
  },
  "luminance": 0.02647
}

Semantic roles & 50–950 ramp

primary

#1D128E

secondary

#B6C23A

accent

#F434E3

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1D128E

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

Preview Lab → · Contrast checker → · Palette generator →