#1B256D#1B256D

#1B256D is a dark, vivid blue. Relative luminance 0.027; OKLCH L 30.8% C 0.124 H 270.9°. Best body text is #FFFFFF at 13.71:1 contrast (WCAG AA passes).

Color values

HEX	#1B256D
RGB	rgb(27, 37, 109)
HSL	hsl(233, 60%, 27%)
HSV	hsv(233, 75%, 43%)
CMYK	cmyk(75.2%, 66.1%, 0%, 57.3%)
CIE-LAB	lab(18.63, 22.80, -43.07)
CIE-LCH	lch(18.63, 48.73, 297.90°)
OKLab	oklab(30.76% 0.002 -0.1244)
OKLCH	oklch(30.76% 0.124 270.9)
XYZ	xyz(3.8729, 2.6599, 14.7743)
Luminance	0.0266 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B256D #6D631B

analogous

#1B4E6D #1B256D #3A1B6D

triadic

#1B256D #6D1B25 #256D1B

tetradic

#1B256D #6D1B4E #6D631B #1B6D3A

square

#1B256D #6D1B4E #6D631B #1B6D3A

split-complementary

#1B256D #6D3A1B #4E6D1B

monochromatic

#060819 #0F143C #1B256D #27369E #3548CD

Accessibility & contrast

On white

13.71

#1B256D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1B256D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B256D

13.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B256D	#FFFFFF	#000000	##FFFFFF
##1B256D	1.00	13.71	1.53	13.71
#FFFFFF	13.71	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00316F

Deuteranopia (green-blind)

#002A6C

Tritanopia (blue-blind)

#003845

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b256d;
/* rgb */ color: rgb(27, 37, 109);
/* oklch */ color: oklch(30.8% 0.124 270.9);

Tailwind

colors: {
  custom: {
    50: '#655f98',
    500: '#1b256d',
    950: '#000000',
  },
}

SCSS

$custom: #1b256d;
$custom-light: #655f98;
$custom-dark: #000000;

JSON

{
  "hex": "#1b256d",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 109
  },
  "hsl": {
    "h": 232.683,
    "s": 60.294,
    "l": 26.667
  },
  "oklch": {
    "l": 0.30755,
    "c": 0.12442,
    "h": 270.9
  },
  "luminance": 0.0266
}

Semantic roles & 50–950 ramp

primary

#1B256D

secondary

#A29642

accent

#D044E3

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040E

muted

#7A797E

Preview Lab

Preview with #1B256D

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

Preview Lab → · Contrast checker → · Palette generator →