#1F4E7B#1F4E7B

#1F4E7B is a dark, moderate cyan. Relative luminance 0.072; OKLCH L 41.5% C 0.091 H 250.1°. Best body text is #FFFFFF at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#1F4E7B
RGB	rgb(31, 78, 123)
HSL	hsl(209, 60%, 30%)
HSV	hsv(209, 75%, 48%)
CMYK	cmyk(74.8%, 36.6%, 0%, 51.8%)
CIE-LAB	lab(32.19, 0.50, -30.14)
CIE-LCH	lch(32.19, 30.15, 270.94°)
OKLab	oklab(41.49% -0.0309 -0.0857)
OKLCH	oklch(41.49% 0.091 250.1)
XYZ	xyz(6.8633, 7.1694, 19.7572)
Luminance	0.0717 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4E7B #7B4C1F

analogous

#1F7B7A #1F4E7B #1F207B

triadic

#1F4E7B #7B1F4E #4E7B1F

tetradic

#1F4E7B #7A1F7B #7B4C1F #207B1F

square

#1F4E7B #7A1F7B #7B4C1F #207B1F

split-complementary

#1F4E7B #7B1F20 #7B7A1F

monochromatic

#061019 #132F4A #1F4E7B #2B6DAC #448CD0

Accessibility & contrast

On white

8.63

#1F4E7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1F4E7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4E7B

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4E7B	#FFFFFF	#000000	##FFFFFF
##1F4E7B	1.00	8.63	2.43	8.63
#FFFFFF	8.63	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A507D

Deuteranopia (green-blind)

#2C487A

Tritanopia (blue-blind)

#00595E

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1f4e7b;
/* rgb */ color: rgb(31, 78, 123);
/* oklch */ color: oklch(41.5% 0.091 250.1);

Tailwind

colors: {
  custom: {
    50: '#687fa1',
    500: '#1f4e7b',
    950: '#000000',
  },
}

SCSS

$custom: #1f4e7b;
$custom-light: #687fa1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4e7b",
  "rgb": {
    "r": 31,
    "g": 78,
    "b": 123
  },
  "hsl": {
    "h": 209.348,
    "s": 59.74,
    "l": 30.196
  },
  "oklch": {
    "l": 0.41491,
    "c": 0.09107,
    "h": 250.1
  },
  "luminance": 0.0717
}

Semantic roles & 50–950 ramp

primary

#1F4E7B

secondary

#AE7A48

accent

#9245E3

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#070A0F

muted

#7A7C7E

Preview Lab

Preview with #1F4E7B

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

Preview Lab → · Contrast checker → · Palette generator →