#1B129F#1B129F

#1B129F is a dark, highly saturated blue. Relative luminance 0.032; OKLCH L 33.9% C 0.206 H 270.0°. Best body text is #FFFFFF at 12.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B129F
RGB	rgb(27, 18, 159)
HSL	hsl(244, 80%, 35%)
HSV	hsv(244, 89%, 62%)
CMYK	cmyk(83%, 88.7%, 0%, 37.6%)
CIE-LAB	lab(20.70, 50.61, -71.11)
CIE-LCH	lch(20.70, 87.29, 305.44°)
OKLab	oklab(33.91% 0.0001 -0.2057)
OKLCH	oklch(33.91% 0.206 270)
XYZ	xyz(6.9242, 3.1680, 33.0407)
Luminance	0.0317 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B129F #969F12

analogous

#124F9F #1B129F #62129F

triadic

#1B129F #9F1B12 #129F1B

tetradic

#1B129F #9F124F #969F12 #129F62

square

#1B129F #9F124F #969F12 #129F62

split-complementary

#1B129F #9F6212 #4F9F12

monochromatic

#080631 #120C68 #1B129F #2418D6 #4D42EA

Accessibility & contrast

On white

12.85

#1B129F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1B129F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B129F

12.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B129F	#FFFFFF	#000000	##FFFFFF
##1B129F	1.00	12.85	1.63	12.85
#FFFFFF	12.85	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0039A3

Deuteranopia (green-blind)

#002A9D

Tritanopia (blue-blind)

#00435D

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b129f;
/* rgb */ color: rgb(27, 18, 159);
/* oklch */ color: oklch(33.9% 0.206 270.0);

Tailwind

colors: {
  custom: {
    50: '#7457bd',
    500: '#1b129f',
    950: '#000000',
  },
}

SCSS

$custom: #1b129f;
$custom-light: #7457bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b129f",
  "rgb": {
    "r": 27,
    "g": 18,
    "b": 159
  },
  "hsl": {
    "h": 243.83,
    "s": 79.661,
    "l": 34.706
  },
  "oklch": {
    "l": 0.33905,
    "c": 0.20569,
    "h": 270
  },
  "luminance": 0.03169
}

Semantic roles & 50–950 ramp

primary

#1B129F

secondary

#C1CA43

accent

#F632EA

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0312

muted

#7C7881

Preview Lab

Preview with #1B129F

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

Preview Lab → · Contrast checker → · Palette generator →