#1F4B73#1F4B73

#1F4B73 is a dark, moderate cyan. Relative luminance 0.066; OKLCH L 40.2% C 0.083 H 248.8°. Best body text is #FFFFFF at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B73
RGB	rgb(31, 75, 115)
HSL	hsl(209, 58%, 29%)
HSV	hsv(209, 73%, 45%)
CMYK	cmyk(73%, 34.8%, 0%, 54.9%)
CIE-LAB	lab(30.78, -0.66, -27.36)
CIE-LCH	lch(30.78, 27.37, 268.62°)
OKLab	oklab(40.24% -0.0302 -0.0776)
OKLCH	oklch(40.24% 0.083 248.8)
XYZ	xyz(6.1745, 6.5606, 17.1572)
Luminance	0.0656 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B73 #73471F

analogous

#1F7371 #1F4B73 #1F2173

triadic

#1F4B73 #731F4B #4B731F

tetradic

#1F4B73 #711F73 #73471F #21731F

square

#1F4B73 #711F73 #73471F #21731F

split-complementary

#1F4B73 #731F21 #73711F

monochromatic

#061018 #122C43 #1F4B73 #2C6AA3 #418ACC

Accessibility & contrast

On white

9.08

#1F4B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#1F4B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B73

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B73	#FFFFFF	#000000	##FFFFFF
##1F4B73	1.00	9.08	2.31	9.08
#FFFFFF	9.08	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#394D75

Deuteranopia (green-blind)

#2D4572

Tritanopia (blue-blind)

#005459

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f4b73;
/* rgb */ color: rgb(31, 75, 115);
/* oklch */ color: oklch(40.2% 0.083 248.8);

Tailwind

colors: {
  custom: {
    50: '#667d9b',
    500: '#1f4b73',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b73;
$custom-light: #667d9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b73",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 115
  },
  "hsl": {
    "h": 208.571,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.40243,
    "c": 0.08324,
    "h": 248.8
  },
  "luminance": 0.06561
}

Semantic roles & 50–950 ramp

primary

#1F4B73

secondary

#A77547

accent

#9047E1

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#06090E

muted

#7A7B7E

Preview Lab

Preview with #1F4B73

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

Preview Lab → · Contrast checker → · Palette generator →