#1F4F8B#1F4F8B

#1F4F8B is a dark, moderate cyan. Relative luminance 0.077; OKLCH L 42.8% C 0.112 H 255.7°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).

Color values

HEX	#1F4F8B
RGB	rgb(31, 79, 139)
HSL	hsl(213, 64%, 33%)
HSV	hsv(213, 78%, 55%)
CMYK	cmyk(77.7%, 43.2%, 0%, 45.5%)
CIE-LAB	lab(33.45, 6.16, -38.01)
CIE-LCH	lch(33.45, 38.51, 279.20°)
OKLab	oklab(42.78% -0.0278 -0.1087)
OKLCH	oklch(42.78% 0.112 255.7)
XYZ	xyz(8.0195, 7.7464, 25.4936)
Luminance	0.0775 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4F8B #8B5B1F

analogous

#1F858B #1F4F8B #251F8B

triadic

#1F4F8B #8B1F4F #4F8B1F

tetradic

#1F4F8B #8B1F85 #8B5B1F #1F8B25

square

#1F4F8B #8B1F85 #8B5B1F #1F8B25

split-complementary

#1F4F8B #8B251F #858B1F

monochromatic

#091627 #143359 #1F4F8B #2A6BBD #4D8BD7

Accessibility & contrast

On white

8.24

#1F4F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#1F4F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4F8B

8.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4F8B	#FFFFFF	#000000	##FFFFFF
##1F4F8B	1.00	8.24	2.55	8.24
#FFFFFF	8.24	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#32548D

Deuteranopia (green-blind)

#1F4A8A

Tritanopia (blue-blind)

#005D66

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1f4f8b;
/* rgb */ color: rgb(31, 79, 139);
/* oklch */ color: oklch(42.8% 0.112 255.7);

Tailwind

colors: {
  custom: {
    50: '#6b7fad',
    500: '#1f4f8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f4f8b;
$custom-light: #6b7fad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4f8b",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 139
  },
  "hsl": {
    "h": 213.333,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.42782,
    "c": 0.1122,
    "h": 255.7
  },
  "luminance": 0.07747
}

Semantic roles & 50–950 ramp

primary

#1F4F8B

secondary

#BA894C

accent

#9D41E7

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1F4F8B

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

Preview Lab → · Contrast checker → · Palette generator →