#1B274B#1B274B

#1B274B is a dark, moderate blue. Relative luminance 0.022; OKLCH L 28.3% C 0.068 H 268.0°. Best body text is #FFFFFF at 14.60:1 contrast (WCAG AA passes).

Color values

HEX	#1B274B
RGB	rgb(27, 39, 75)
HSL	hsl(225, 47%, 20%)
HSV	hsv(225, 64%, 29%)
CMYK	cmyk(64%, 48%, 0%, 70.6%)
CIE-LAB	lab(16.46, 7.71, -23.95)
CIE-LCH	lch(16.46, 25.17, 287.84°)
OKLab	oklab(28.26% -0.0024 -0.0682)
OKLCH	oklch(28.26% 0.068 268)
XYZ	xyz(2.4471, 2.1919, 6.9494)
Luminance	0.0219 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B274B #4B3F1B

analogous

#1B3F4B #1B274B #271B4B

triadic

#1B274B #4B1B27 #274B1B

tetradic

#1B274B #4B1B3F #4B3F1B #1B4B27

square

#1B274B #4B1B3F #4B3F1B #1B4B27

split-complementary

#1B274B #4B271B #3F4B1B

monochromatic

#080C17 #0B101E #1B274B #2B3E78 #3B56A5

Accessibility & contrast

On white

14.60

#1B274B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.44

#1B274B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B274B

14.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B274B	#FFFFFF	#000000	##FFFFFF
##1B274B	1.00	14.60	1.44	14.60
#FFFFFF	14.60	1.00	21.00	1.00
#000000	1.44	21.00	1.00	21.00
##FFFFFF	14.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#172B4C

Deuteranopia (green-blind)

#11274A

Tritanopia (blue-blind)

#002F35

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1b274b;
/* rgb */ color: rgb(27, 39, 75);
/* oklch */ color: oklch(28.3% 0.068 268.0);

Tailwind

colors: {
  custom: {
    50: '#5c607d',
    500: '#1b274b',
    950: '#000000',
  },
}

SCSS

$custom: #1b274b;
$custom-light: #5c607d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b274b",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 75
  },
  "hsl": {
    "h": 225,
    "s": 47.059,
    "l": 20
  },
  "oklch": {
    "l": 0.28259,
    "c": 0.06822,
    "h": 268
  },
  "luminance": 0.02192
}

Semantic roles & 50–950 ramp

primary

#1B274B

secondary

#817141

accent

#B551D7

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040509

muted

#79797B

Preview Lab

Preview with #1B274B

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

Preview Lab → · Contrast checker → · Palette generator →