#1B2B63#1B2B63

#1B2B63 is a dark, moderate blue. Relative luminance 0.029; OKLCH L 31.1% C 0.101 H 268.0°. Best body text is #FFFFFF at 13.36:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B63
RGB	rgb(27, 43, 99)
HSL	hsl(227, 57%, 25%)
HSV	hsv(227, 73%, 39%)
CMYK	cmyk(72.7%, 56.6%, 0%, 61.2%)
CIE-LAB	lab(19.48, 14.47, -35.16)
CIE-LCH	lch(19.48, 38.02, 292.38°)
OKLab	oklab(31.12% -0.0035 -0.1011)
OKLCH	oklch(31.12% 0.101 268)
XYZ	xyz(3.5672, 2.8613, 12.1662)
Luminance	0.0286 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B63 #63531B

analogous

#1B4F63 #1B2B63 #2F1B63

triadic

#1B2B63 #631B2B #2B631B

tetradic

#1B2B63 #631B4F #63531B #1B632F

square

#1B2B63 #631B4F #63531B #1B632F

split-complementary

#1B2B63 #632F1B #4F631B

monochromatic

#070A18 #0E1633 #1B2B63 #284093 #3555C3

Accessibility & contrast

On white

13.36

#1B2B63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1B2B63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B63

13.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B63	#FFFFFF	#000000	##FFFFFF
##1B2B63	1.00	13.36	1.57	13.36
#FFFFFF	13.36	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#053365

Deuteranopia (green-blind)

#002C62

Tritanopia (blue-blind)

#003842

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2b63;
/* rgb */ color: rgb(27, 43, 99);
/* oklch */ color: oklch(31.1% 0.101 268.0);

Tailwind

colors: {
  custom: {
    50: '#616390',
    500: '#1b2b63',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b63;
$custom-light: #616390;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b63",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 99
  },
  "hsl": {
    "h": 226.667,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.31121,
    "c": 0.10112,
    "h": 268
  },
  "luminance": 0.02862
}

Semantic roles & 50–950 ramp

primary

#1B2B63

secondary

#988541

accent

#BE47E0

background

#F6F5F8

surface

#EBEAF0

border

#C6C6CB

text

#05050C

muted

#7A797D

Preview Lab

Preview with #1B2B63

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

Preview Lab → · Contrast checker → · Palette generator →