#1F4B79#1F4B79

#1F4B79 is a dark, moderate cyan. Relative luminance 0.067; OKLCH L 40.6% C 0.092 H 251.9°. Best body text is #FFFFFF at 8.97:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B79
RGB	rgb(31, 75, 121)
HSL	hsl(211, 59%, 30%)
HSV	hsv(211, 74%, 47%)
CMYK	cmyk(74.4%, 38%, 0%, 52.5%)
CIE-LAB	lab(31.12, 1.69, -30.59)
CIE-LCH	lch(31.12, 30.63, 273.15°)
OKLab	oklab(40.62% -0.0284 -0.087)
OKLCH	oklch(40.62% 0.092 251.9)
XYZ	xyz(6.5311, 6.7032, 19.0351)
Luminance	0.0670 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B79 #794D1F

analogous

#1F7879 #1F4B79 #201F79

triadic

#1F4B79 #791F4B #4B791F

tetradic

#1F4B79 #791F78 #794D1F #1F7920

square

#1F4B79 #791F78 #794D1F #1F7920

split-complementary

#1F4B79 #79201F #78791F

monochromatic

#060F18 #132D48 #1F4B79 #2B69AA #4388CF

Accessibility & contrast

On white

8.97

#1F4B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1F4B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B79

8.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B79	#FFFFFF	#000000	##FFFFFF
##1F4B79	1.00	8.97	2.34	8.97
#FFFFFF	8.97	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#364E7B

Deuteranopia (green-blind)

#294578

Tritanopia (blue-blind)

#00565C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1f4b79;
/* rgb */ color: rgb(31, 75, 121);
/* oklch */ color: oklch(40.6% 0.092 251.9);

Tailwind

colors: {
  custom: {
    50: '#677ca0',
    500: '#1f4b79',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b79;
$custom-light: #677ca0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b79",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 121
  },
  "hsl": {
    "h": 210.667,
    "s": 59.211,
    "l": 29.804
  },
  "oklch": {
    "l": 0.40617,
    "c": 0.09151,
    "h": 251.9
  },
  "luminance": 0.06704
}

Semantic roles & 50–950 ramp

primary

#1F4B79

secondary

#AC7B47

accent

#9645E2

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#07090E

muted

#7A7B7E

Preview Lab

Preview with #1F4B79

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

Preview Lab → · Contrast checker → · Palette generator →