#1B256A#1B256A

#1B256A is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.5% C 0.120 H 271.0°. Best body text is #FFFFFF at 13.82:1 contrast (WCAG AA passes).

Color values

HEX	#1B256A
RGB	rgb(27, 37, 106)
HSL	hsl(232, 59%, 26%)
HSV	hsv(232, 75%, 42%)
CMYK	cmyk(74.5%, 65.1%, 0%, 58.4%)
CIE-LAB	lab(18.35, 21.62, -41.57)
CIE-LCH	lch(18.35, 46.86, 297.47°)
OKLab	oklab(30.46% 0.0021 -0.12)
OKLCH	oklch(30.46% 0.12 271)
XYZ	xyz(3.7142, 2.5964, 13.9383)
Luminance	0.0260 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B256A #6A601B

analogous

#1B4C6A #1B256A #381B6A

triadic

#1B256A #6A1B25 #256A1B

tetradic

#1B256A #6A1B4C #6A601B #1B6A38

square

#1B256A #6A1B4C #6A601B #1B6A38

split-complementary

#1B256A #6A381B #4C6A1B

monochromatic

#060918 #0F1439 #1B256A #27369B #3447CB

Accessibility & contrast

On white

13.82

#1B256A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1B256A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B256A

13.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B256A	#FFFFFF	#000000	##FFFFFF
##1B256A	1.00	13.82	1.52	13.82
#FFFFFF	13.82	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00306C

Deuteranopia (green-blind)

#002969

Tritanopia (blue-blind)

#003743

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b256a;
/* rgb */ color: rgb(27, 37, 106);
/* oklch */ color: oklch(30.5% 0.120 271.0);

Tailwind

colors: {
  custom: {
    50: '#645f95',
    500: '#1b256a',
    950: '#000000',
  },
}

SCSS

$custom: #1b256a;
$custom-light: #645f95;
$custom-dark: #000000;

JSON

{
  "hex": "#1b256a",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 106
  },
  "hsl": {
    "h": 232.405,
    "s": 59.398,
    "l": 26.078
  },
  "oklch": {
    "l": 0.30464,
    "c": 0.12002,
    "h": 271
  },
  "luminance": 0.02597
}

Semantic roles & 50–950 ramp

primary

#1B256A

secondary

#9F9342

accent

#CF45E3

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040D

muted

#7A797E

Preview Lab

Preview with #1B256A

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

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