#1B255F#1B255F

#1B255F is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.4% C 0.103 H 271.2°. Best body text is #FFFFFF at 14.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B255F
RGB	rgb(27, 37, 95)
HSL	hsl(231, 56%, 24%)
HSV	hsv(231, 72%, 37%)
CMYK	cmyk(71.6%, 61.1%, 0%, 62.7%)
CIE-LAB	lab(17.38, 17.22, -35.93)
CIE-LCH	lch(17.38, 39.84, 295.61°)
OKLab	oklab(29.44% 0.0022 -0.1034)
OKLCH	oklch(29.44% 0.103 271.2)
XYZ	xyz(3.1784, 2.3821, 11.1165)
Luminance	0.0238 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B255F #5F551B

analogous

#1B475F #1B255F #331B5F

triadic

#1B255F #5F1B25 #255F1B

tetradic

#1B255F #5F1B47 #5F551B #1B5F33

square

#1B255F #5F1B47 #5F551B #1B5F33

split-complementary

#1B255F #5F331B #475F1B

monochromatic

#070918 #0D122F #1B255F #29388F #364ABE

Accessibility & contrast

On white

14.22

#1B255F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#1B255F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B255F

14.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B255F	#FFFFFF	#000000	##FFFFFF
##1B255F	1.00	14.22	1.48	14.22
#FFFFFF	14.22	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E61

Deuteranopia (green-blind)

#00285E

Tritanopia (blue-blind)

#00333E

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #1b255f;
/* rgb */ color: rgb(27, 37, 95);
/* oklch */ color: oklch(29.4% 0.103 271.2);

Tailwind

colors: {
  custom: {
    50: '#615f8d',
    500: '#1b255f',
    950: '#000000',
  },
}

SCSS

$custom: #1b255f;
$custom-light: #615f8d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b255f",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 95
  },
  "hsl": {
    "h": 231.176,
    "s": 55.738,
    "l": 23.922
  },
  "oklch": {
    "l": 0.29438,
    "c": 0.10344,
    "h": 271.2
  },
  "luminance": 0.02382
}

Semantic roles & 50–950 ramp

primary

#1B255F

secondary

#958841

accent

#C949DF

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05040C

muted

#7A797D

Preview Lab

Preview with #1B255F

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

Preview Lab → · Contrast checker → · Palette generator →