#1B256E#1B256E

#1B256E is a dark, vivid blue. Relative luminance 0.027; OKLCH L 30.9% C 0.126 H 270.9°. Best body text is #FFFFFF at 13.67:1 contrast (WCAG AA passes).

Color values

HEX	#1B256E
RGB	rgb(27, 37, 110)
HSL	hsl(233, 61%, 27%)
HSV	hsv(233, 75%, 43%)
CMYK	cmyk(75.5%, 66.4%, 0%, 56.9%)
CIE-LAB	lab(18.72, 23.20, -43.57)
CIE-LCH	lch(18.72, 49.36, 298.03°)
OKLab	oklab(30.85% 0.002 -0.1258)
OKLCH	oklch(30.85% 0.126 270.9)
XYZ	xyz(3.9271, 2.6815, 15.0595)
Luminance	0.0268 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B256E #6E641B

analogous

#1B4F6E #1B256E #3B1B6E

triadic

#1B256E #6E1B25 #256E1B

tetradic

#1B256E #6E1B4F #6E641B #1B6E3B

square

#1B256E #6E1B4F #6E641B #1B6E3B

split-complementary

#1B256E #6E3B1B #4F6E1B

monochromatic

#060819 #0F143D #1B256E #27369F #3648CE

Accessibility & contrast

On white

13.67

#1B256E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1B256E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B256E

13.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B256E	#FFFFFF	#000000	##FFFFFF
##1B256E	1.00	13.67	1.54	13.67
#FFFFFF	13.67	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003170

Deuteranopia (green-blind)

#002A6D

Tritanopia (blue-blind)

#003845

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b256e;
/* rgb */ color: rgb(27, 37, 110);
/* oklch */ color: oklch(30.9% 0.126 270.9);

Tailwind

colors: {
  custom: {
    50: '#655f98',
    500: '#1b256e',
    950: '#000000',
  },
}

SCSS

$custom: #1b256e;
$custom-light: #655f98;
$custom-dark: #000000;

JSON

{
  "hex": "#1b256e",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 110
  },
  "hsl": {
    "h": 232.771,
    "s": 60.584,
    "l": 26.863
  },
  "oklch": {
    "l": 0.30853,
    "c": 0.12587,
    "h": 270.9
  },
  "luminance": 0.02682
}

Semantic roles & 50–950 ramp

primary

#1B256E

secondary

#A39742

accent

#D044E4

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040E

muted

#7A797E

Preview Lab

Preview with #1B256E

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

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