#1B4271#1B4271

#1B4271 is a dark, moderate cyan. Relative luminance 0.053; OKLCH L 37.7% C 0.092 H 254.8°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#1B4271
RGB	rgb(27, 66, 113)
HSL	hsl(213, 61%, 27%)
HSV	hsv(213, 76%, 44%)
CMYK	cmyk(76.1%, 41.6%, 0%, 55.7%)
CIE-LAB	lab(27.63, 3.91, -31.11)
CIE-LCH	lch(27.63, 31.35, 277.17°)
OKLab	oklab(37.7% -0.0241 -0.0887)
OKLCH	oklch(37.7% 0.092 254.8)
XYZ	xyz(5.3797, 5.3211, 16.3631)
Luminance	0.0532 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4271 #714A1B

analogous

#1B6D71 #1B4271 #1F1B71

triadic

#1B4271 #711B42 #42711B

tetradic

#1B4271 #711B6D #714A1B #1B711F

square

#1B4271 #711B6D #714A1B #1B711F

split-complementary

#1B4271 #711F1B #6D711B

monochromatic

#060E19 #0F2540 #1B4271 #275FA2 #377CCF

Accessibility & contrast

On white

10.17

#1B4271 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1B4271 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4271

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4271	#FFFFFF	#000000	##FFFFFF
##1B4271	1.00	10.17	2.06	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C4673

Deuteranopia (green-blind)

#1E3E70

Tritanopia (blue-blind)

#004D54

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b4271;
/* rgb */ color: rgb(27, 66, 113);
/* oklch */ color: oklch(37.7% 0.092 254.8);

Tailwind

colors: {
  custom: {
    50: '#64769a',
    500: '#1b4271',
    950: '#000000',
  },
}

SCSS

$custom: #1b4271;
$custom-light: #64769a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4271",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 113
  },
  "hsl": {
    "h": 212.791,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.37696,
    "c": 0.09196,
    "h": 254.8
  },
  "luminance": 0.05322
}

Semantic roles & 50–950 ramp

primary

#1B4271

secondary

#A67942

accent

#9B43E5

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1B4271

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

Preview Lab → · Contrast checker → · Palette generator →