#1B427F#1B427F

#1B427F is a dark, moderate blue. Relative luminance 0.057; OKLCH L 38.7% C 0.112 H 259.2°. Best body text is #FFFFFF at 9.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B427F
RGB	rgb(27, 66, 127)
HSL	hsl(217, 65%, 30%)
HSV	hsv(217, 79%, 50%)
CMYK	cmyk(78.7%, 48%, 0%, 50.2%)
CIE-LAB	lab(28.54, 9.61, -38.46)
CIE-LCH	lch(28.54, 39.65, 284.03°)
OKLab	oklab(38.69% -0.0211 -0.1103)
OKLCH	oklch(38.69% 0.112 259.2)
XYZ	xyz(6.2296, 5.6610, 20.8389)
Luminance	0.0566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B427F #7F581B

analogous

#1B747F #1B427F #261B7F

triadic

#1B427F #7F1B42 #427F1B

tetradic

#1B427F #7F1B74 #7F581B #1B7F26

square

#1B427F #7F1B74 #7F581B #1B7F26

split-complementary

#1B427F #7F261B #747F1B

monochromatic

#060E1A #10284D #1B427F #265CB1 #3E7AD6

Accessibility & contrast

On white

9.85

#1B427F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1B427F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B427F

9.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B427F	#FFFFFF	#000000	##FFFFFF
##1B427F	1.00	9.85	2.13	9.85
#FFFFFF	9.85	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214881

Deuteranopia (green-blind)

#083F7E

Tritanopia (blue-blind)

#00505A

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b427f;
/* rgb */ color: rgb(27, 66, 127);
/* oklch */ color: oklch(38.7% 0.112 259.2);

Tailwind

colors: {
  custom: {
    50: '#6775a4',
    500: '#1b427f',
    950: '#000000',
  },
}

SCSS

$custom: #1b427f;
$custom-light: #6775a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b427f",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 127
  },
  "hsl": {
    "h": 216.6,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.38694,
    "c": 0.11234,
    "h": 259.2
  },
  "luminance": 0.05662
}

Semantic roles & 50–950 ramp

primary

#1B427F

secondary

#B38743

accent

#A640E8

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B427F

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

Preview Lab → · Contrast checker → · Palette generator →