#1B255E#1B255E

#1B255E is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.3% C 0.102 H 271.2°. Best body text is #FFFFFF at 14.26:1 contrast (WCAG AA passes).

Color values

HEX	#1B255E
RGB	rgb(27, 37, 94)
HSL	hsl(231, 55%, 24%)
HSV	hsv(231, 71%, 37%)
CMYK	cmyk(71.3%, 60.6%, 0%, 63.1%)
CIE-LAB	lab(17.29, 16.82, -35.40)
CIE-LCH	lch(17.29, 39.20, 295.41°)
OKLab	oklab(29.35% 0.0021 -0.1019)
OKLCH	oklch(29.35% 0.102 271.2)
XYZ	xyz(3.1333, 2.3640, 10.8787)
Luminance	0.0236 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B255E #5E541B

analogous

#1B465E #1B255E #321B5E

triadic

#1B255E #5E1B25 #255E1B

tetradic

#1B255E #5E1B46 #5E541B #1B5E32

square

#1B255E #5E1B46 #5E541B #1B5E32

split-complementary

#1B255E #5E321B #465E1B

monochromatic

#070918 #0D122E #1B255E #29388E #364ABD

Accessibility & contrast

On white

14.26

#1B255E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1B255E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B255E

14.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B255E	#FFFFFF	#000000	##FFFFFF
##1B255E	1.00	14.26	1.47	14.26
#FFFFFF	14.26	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E60

Deuteranopia (green-blind)

#00285D

Tritanopia (blue-blind)

#00333D

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1b255e;
/* rgb */ color: rgb(27, 37, 94);
/* oklch */ color: oklch(29.3% 0.102 271.2);

Tailwind

colors: {
  custom: {
    50: '#615f8c',
    500: '#1b255e',
    950: '#000000',
  },
}

SCSS

$custom: #1b255e;
$custom-light: #615f8c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b255e",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 94
  },
  "hsl": {
    "h": 231.045,
    "s": 55.372,
    "l": 23.725
  },
  "oklch": {
    "l": 0.29348,
    "c": 0.1019,
    "h": 271.2
  },
  "luminance": 0.02364
}

Semantic roles & 50–950 ramp

primary

#1B255E

secondary

#948741

accent

#C849DF

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05040C

muted

#7A797D

Preview Lab

Preview with #1B255E

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

Preview Lab → · Contrast checker → · Palette generator →