#1B4579#1B4579

#1B4579 is a dark, moderate cyan. Relative luminance 0.059; OKLCH L 39.0% C 0.100 H 255.4°. Best body text is #FFFFFF at 9.66:1 contrast (WCAG AA passes).

Color values

HEX	#1B4579
RGB	rgb(27, 69, 121)
HSL	hsl(213, 64%, 29%)
HSV	hsv(213, 78%, 47%)
CMYK	cmyk(77.7%, 43%, 0%, 52.5%)
CIE-LAB	lab(29.08, 5.11, -33.84)
CIE-LCH	lch(29.08, 34.23, 278.58°)
OKLab	oklab(38.99% -0.0251 -0.0967)
OKLCH	oklch(38.99% 0.1 255.4)
XYZ	xyz(6.0300, 5.8690, 18.9005)
Luminance	0.0587 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4579 #794F1B

analogous

#1B7479 #1B4579 #201B79

triadic

#1B4579 #791B45 #45791B

tetradic

#1B4579 #791B74 #794F1B #1B7920

square

#1B4579 #791B74 #794F1B #1B7920

split-complementary

#1B4579 #79201B #74791B

monochromatic

#060E19 #102847 #1B4579 #2662AB #3B7FD3

Accessibility & contrast

On white

9.66

#1B4579 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#1B4579 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4579

9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4579	#FFFFFF	#000000	##FFFFFF
##1B4579	1.00	9.66	2.17	9.66
#FFFFFF	9.66	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C497B

Deuteranopia (green-blind)

#1C4178

Tritanopia (blue-blind)

#005159

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b4579;
/* rgb */ color: rgb(27, 69, 121);
/* oklch */ color: oklch(39.0% 0.100 255.4);

Tailwind

colors: {
  custom: {
    50: '#6678a0',
    500: '#1b4579',
    950: '#000000',
  },
}

SCSS

$custom: #1b4579;
$custom-light: #6678a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4579",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 121
  },
  "hsl": {
    "h": 213.191,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.38985,
    "c": 0.09992,
    "h": 255.4
  },
  "luminance": 0.0587
}

Semantic roles & 50–950 ramp

primary

#1B4579

secondary

#AD7E43

accent

#9D41E7

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#06080F

muted

#7A7B7E

Preview Lab

Preview with #1B4579

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

Preview Lab → · Contrast checker → · Palette generator →