#1B256F#1B256F

#1B256F is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.0% C 0.127 H 270.9°. Best body text is #FFFFFF at 13.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B256F
RGB	rgb(27, 37, 111)
HSL	hsl(233, 61%, 27%)
HSV	hsv(233, 76%, 44%)
CMYK	cmyk(75.7%, 66.7%, 0%, 56.5%)
CIE-LAB	lab(18.81, 23.59, -44.06)
CIE-LCH	lch(18.81, 49.98, 298.17°)
OKLab	oklab(30.95% 0.0019 -0.1273)
OKLCH	oklch(30.95% 0.127 270.9)
XYZ	xyz(3.9818, 2.7034, 15.3478)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B256F #6F651B

analogous

#1B4F6F #1B256F #3B1B6F

triadic

#1B256F #6F1B25 #256F1B

tetradic

#1B256F #6F1B4F #6F651B #1B6F3B

square

#1B256F #6F1B4F #6F651B #1B6F3B

split-complementary

#1B256F #6F3B1B #4F6F1B

monochromatic

#060819 #0F153E #1B256F #2735A0 #3648CE

Accessibility & contrast

On white

13.63

#1B256F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1B256F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B256F

13.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B256F	#FFFFFF	#000000	##FFFFFF
##1B256F	1.00	13.63	1.54	13.63
#FFFFFF	13.63	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003271

Deuteranopia (green-blind)

#002A6E

Tritanopia (blue-blind)

#003846

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b256f;
/* rgb */ color: rgb(27, 37, 111);
/* oklch */ color: oklch(31.0% 0.127 270.9);

Tailwind

colors: {
  custom: {
    50: '#655f99',
    500: '#1b256f',
    950: '#000000',
  },
}

SCSS

$custom: #1b256f;
$custom-light: #655f99;
$custom-dark: #000000;

JSON

{
  "hex": "#1b256f",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 111
  },
  "hsl": {
    "h": 232.857,
    "s": 60.87,
    "l": 27.059
  },
  "oklch": {
    "l": 0.30951,
    "c": 0.1273,
    "h": 270.9
  },
  "luminance": 0.02704
}

Semantic roles & 50–950 ramp

primary

#1B256F

secondary

#A49842

accent

#D144E4

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040E

muted

#7A797E

Preview Lab

Preview with #1B256F

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

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