#1B4375#1B4375

#1B4375 is a dark, moderate cyan. Relative luminance 0.055; OKLCH L 38.2% C 0.097 H 255.5°. Best body text is #FFFFFF at 9.97:1 contrast (WCAG AA passes).

Color values

HEX	#1B4375
RGB	rgb(27, 67, 117)
HSL	hsl(213, 63%, 28%)
HSV	hsv(213, 77%, 46%)
CMYK	cmyk(76.9%, 42.7%, 0%, 54.1%)
CIE-LAB	lab(28.20, 4.85, -32.73)
CIE-LCH	lch(28.20, 33.09, 278.43°)
OKLab	oklab(38.22% -0.0241 -0.0935)
OKLCH	oklch(38.22% 0.097 255.5)
XYZ	xyz(5.6689, 5.5310, 17.5950)
Luminance	0.0553 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4375 #754D1B

analogous

#1B7075 #1B4375 #201B75

triadic

#1B4375 #751B43 #43751B

tetradic

#1B4375 #751B70 #754D1B #1B7520

square

#1B4375 #751B70 #754D1B #1B7520

split-complementary

#1B4375 #75201B #70751B

monochromatic

#060E19 #102743 #1B4375 #265FA7 #397DD1

Accessibility & contrast

On white

9.97

#1B4375 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1B4375 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4375

9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4375	#FFFFFF	#000000	##FFFFFF
##1B4375	1.00	9.97	2.11	9.97
#FFFFFF	9.97	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B4777

Deuteranopia (green-blind)

#1C3F74

Tritanopia (blue-blind)

#004F56

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b4375;
/* rgb */ color: rgb(27, 67, 117);
/* oklch */ color: oklch(38.2% 0.097 255.5);

Tailwind

colors: {
  custom: {
    50: '#65769d',
    500: '#1b4375',
    950: '#000000',
  },
}

SCSS

$custom: #1b4375;
$custom-light: #65769d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4375",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 117
  },
  "hsl": {
    "h": 213.333,
    "s": 62.5,
    "l": 28.235
  },
  "oklch": {
    "l": 0.38217,
    "c": 0.09656,
    "h": 255.5
  },
  "luminance": 0.05532
}

Semantic roles & 50–950 ramp

primary

#1B4375

secondary

#A97C42

accent

#9D42E6

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1B4375

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

Preview Lab → · Contrast checker → · Palette generator →