#1B255D#1B255D

#1B255D is a dark, moderate blue. Relative luminance 0.023; OKLCH L 29.3% C 0.100 H 271.2°. Best body text is #FFFFFF at 14.29:1 contrast (WCAG AA passes).

Color values

HEX	#1B255D
RGB	rgb(27, 37, 93)
HSL	hsl(231, 55%, 24%)
HSV	hsv(231, 71%, 36%)
CMYK	cmyk(71%, 60.2%, 0%, 63.5%)
CIE-LAB	lab(17.21, 16.42, -34.88)
CIE-LCH	lch(17.21, 38.55, 295.21°)
OKLab	oklab(29.26% 0.0021 -0.1003)
OKLCH	oklch(29.26% 0.1 271.2)
XYZ	xyz(3.0887, 2.3462, 10.6439)
Luminance	0.0235 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B255D #5D531B

analogous

#1B465D #1B255D #321B5D

triadic

#1B255D #5D1B25 #255D1B

tetradic

#1B255D #5D1B46 #5D531B #1B5D32

square

#1B255D #5D1B46 #5D531B #1B5D32

split-complementary

#1B255D #5D321B #465D1B

monochromatic

#070918 #0D122E #1B255D #29388C #374BBC

Accessibility & contrast

On white

14.29

#1B255D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1B255D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B255D

14.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B255D	#FFFFFF	#000000	##FFFFFF
##1B255D	1.00	14.29	1.47	14.29
#FFFFFF	14.29	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D5F

Deuteranopia (green-blind)

#00275C

Tritanopia (blue-blind)

#00333D

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1b255d;
/* rgb */ color: rgb(27, 37, 93);
/* oklch */ color: oklch(29.3% 0.100 271.2);

Tailwind

colors: {
  custom: {
    50: '#605f8b',
    500: '#1b255d',
    950: '#000000',
  },
}

SCSS

$custom: #1b255d;
$custom-light: #605f8b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b255d",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 93
  },
  "hsl": {
    "h": 230.909,
    "s": 55,
    "l": 23.529
  },
  "oklch": {
    "l": 0.29259,
    "c": 0.10035,
    "h": 271.2
  },
  "luminance": 0.02346
}

Semantic roles & 50–950 ramp

primary

#1B255D

secondary

#938641

accent

#C849DE

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05040C

muted

#7A797D

Preview Lab

Preview with #1B255D

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

Preview Lab → · Contrast checker → · Palette generator →