#1B2575#1B2575

#1B2575 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.6% C 0.136 H 270.6°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#1B2575
RGB	rgb(27, 37, 117)
HSL	hsl(233, 63%, 28%)
HSV	hsv(233, 77%, 46%)
CMYK	cmyk(76.9%, 68.4%, 0%, 54.1%)
CIE-LAB	lab(19.39, 25.93, -46.98)
CIE-LCH	lch(19.39, 53.67, 298.90°)
OKLab	oklab(31.55% 0.0015 -0.1358)
OKLCH	oklch(31.55% 0.136 270.6)
XYZ	xyz(4.3234, 2.8400, 17.1465)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2575 #756B1B

analogous

#1B5275 #1B2575 #3E1B75

triadic

#1B2575 #751B25 #25751B

tetradic

#1B2575 #751B52 #756B1B #1B753E

square

#1B2575 #751B52 #756B1B #1B753E

split-complementary

#1B2575 #753E1B #52751B

monochromatic

#060819 #101543 #1B2575 #2635A7 #394AD1

Accessibility & contrast

On white

13.39

#1B2575 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1B2575 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2575

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2575	#FFFFFF	#000000	##FFFFFF
##1B2575	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003378

Deuteranopia (green-blind)

#002B73

Tritanopia (blue-blind)

#003A49

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2575;
/* rgb */ color: rgb(27, 37, 117);
/* oklch */ color: oklch(31.6% 0.136 270.6);

Tailwind

colors: {
  custom: {
    50: '#675f9e',
    500: '#1b2575',
    950: '#000000',
  },
}

SCSS

$custom: #1b2575;
$custom-light: #675f9e;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2575",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 117
  },
  "hsl": {
    "h": 233.333,
    "s": 62.5,
    "l": 28.235
  },
  "oklch": {
    "l": 0.31551,
    "c": 0.13586,
    "h": 270.6
  },
  "luminance": 0.02841
}

Semantic roles & 50–950 ramp

primary

#1B2575

secondary

#A99E42

accent

#D342E6

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2575

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

Preview Lab → · Contrast checker → · Palette generator →