#1B255C#1B255C

#1B255C is a dark, moderate blue. Relative luminance 0.023; OKLCH L 29.2% C 0.099 H 271.2°. Best body text is #FFFFFF at 14.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B255C
RGB	rgb(27, 37, 92)
HSL	hsl(231, 55%, 23%)
HSV	hsv(231, 71%, 36%)
CMYK	cmyk(70.7%, 59.8%, 0%, 63.9%)
CIE-LAB	lab(17.13, 16.02, -34.35)
CIE-LCH	lch(17.13, 37.90, 295.00°)
OKLab	oklab(29.17% 0.002 -0.0988)
OKLCH	oklch(29.17% 0.099 271.2)
XYZ	xyz(3.0447, 2.3286, 10.4121)
Luminance	0.0233 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B255C #5C521B

analogous

#1B455C #1B255C #311B5C

triadic

#1B255C #5C1B25 #255C1B

tetradic

#1B255C #5C1B45 #5C521B #1B5C31

square

#1B255C #5C1B45 #5C521B #1B5C31

split-complementary

#1B255C #5C311B #455C1B

monochromatic

#070A18 #0D122D #1B255C #29388B #374BBB

Accessibility & contrast

On white

14.33

#1B255C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1B255C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B255C

14.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B255C	#FFFFFF	#000000	##FFFFFF
##1B255C	1.00	14.33	1.47	14.33
#FFFFFF	14.33	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D5E

Deuteranopia (green-blind)

#00275B

Tritanopia (blue-blind)

#00323C

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1b255c;
/* rgb */ color: rgb(27, 37, 92);
/* oklch */ color: oklch(29.2% 0.099 271.2);

Tailwind

colors: {
  custom: {
    50: '#605f8b',
    500: '#1b255c',
    950: '#000000',
  },
}

SCSS

$custom: #1b255c;
$custom-light: #605f8b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b255c",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 92
  },
  "hsl": {
    "h": 230.769,
    "s": 54.622,
    "l": 23.333
  },
  "oklch": {
    "l": 0.29171,
    "c": 0.09879,
    "h": 271.2
  },
  "luminance": 0.02329
}

Semantic roles & 50–950 ramp

primary

#1B255C

secondary

#928541

accent

#C74ADE

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05040C

muted

#79797D

Preview Lab

Preview with #1B255C

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

Preview Lab → · Contrast checker → · Palette generator →