#1B427D#1B427D

#1B427D is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.5% C 0.109 H 258.7°. Best body text is #FFFFFF at 9.90:1 contrast (WCAG AA passes).

Color values

HEX	#1B427D
RGB	rgb(27, 66, 125)
HSL	hsl(216, 64%, 30%)
HSV	hsv(216, 78%, 49%)
CMYK	cmyk(78.4%, 47.2%, 0%, 51%)
CIE-LAB	lab(28.40, 8.79, -37.43)
CIE-LCH	lch(28.40, 38.45, 283.22°)
OKLab	oklab(38.55% -0.0214 -0.1073)
OKLCH	oklch(38.55% 0.109 258.7)
XYZ	xyz(6.1005, 5.6094, 20.1593)
Luminance	0.0561 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B427D #7D561B

analogous

#1B737D #1B427D #251B7D

triadic

#1B427D #7D1B42 #427D1B

tetradic

#1B427D #7D1B73 #7D561B #1B7D25

square

#1B427D #7D1B73 #7D561B #1B7D25

split-complementary

#1B427D #7D251B #737D1B

monochromatic

#050D19 #10274B #1B427D #265DAF #3D7AD5

Accessibility & contrast

On white

9.90

#1B427D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1B427D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B427D

9.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B427D	#FFFFFF	#000000	##FFFFFF
##1B427D	1.00	9.90	2.12	9.90
#FFFFFF	9.90	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23487F

Deuteranopia (green-blind)

#0D3F7C

Tritanopia (blue-blind)

#005059

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b427d;
/* rgb */ color: rgb(27, 66, 125);
/* oklch */ color: oklch(38.5% 0.109 258.7);

Tailwind

colors: {
  custom: {
    50: '#6775a3',
    500: '#1b427d',
    950: '#000000',
  },
}

SCSS

$custom: #1b427d;
$custom-light: #6775a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b427d",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 125
  },
  "hsl": {
    "h": 216.122,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.38546,
    "c": 0.10944,
    "h": 258.7
  },
  "luminance": 0.0561
}

Semantic roles & 50–950 ramp

primary

#1B427D

secondary

#B18543

accent

#A540E7

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B427D

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

Preview Lab → · Contrast checker → · Palette generator →