#1F197B#1F197B

#1F197B is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.5% C 0.156 H 274.6°. Best body text is #FFFFFF at 14.16:1 contrast (WCAG AA passes).

Color values

HEX	#1F197B
RGB	rgb(31, 25, 123)
HSL	hsl(244, 66%, 29%)
HSV	hsv(244, 80%, 48%)
CMYK	cmyk(74.8%, 79.7%, 0%, 51.8%)
CIE-LAB	lab(17.54, 36.15, -53.87)
CIE-LCH	lch(17.54, 64.88, 303.87°)
OKLab	oklab(30.48% 0.0125 -0.1558)
OKLCH	oklch(30.48% 0.156 274.6)
XYZ	xyz(4.4867, 2.4162, 18.9650)
Luminance	0.0242 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F197B #757B19

analogous

#19447B #1F197B #50197B

triadic

#1F197B #7B1F19 #197B1F

tetradic

#1F197B #7B1944 #757B19 #197B50

square

#1F197B #7B1944 #757B19 #197B50

split-complementary

#1F197B #7B5019 #447B19

monochromatic

#060519 #120F48 #1F197B #2C23AE #4238D7

Accessibility & contrast

On white

14.16

#1F197B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#1F197B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F197B

14.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F197B	#FFFFFF	#000000	##FFFFFF
##1F197B	1.00	14.16	1.48	14.16
#FFFFFF	14.16	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7E

Deuteranopia (green-blind)

#002679

Tritanopia (blue-blind)

#003649

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #1f197b;
/* rgb */ color: rgb(31, 25, 123);
/* oklch */ color: oklch(30.5% 0.156 274.6);

Tailwind

colors: {
  custom: {
    50: '#6b58a2',
    500: '#1f197b',
    950: '#000000',
  },
}

SCSS

$custom: #1f197b;
$custom-light: #6b58a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f197b",
  "rgb": {
    "r": 31,
    "g": 25,
    "b": 123
  },
  "hsl": {
    "h": 243.673,
    "s": 66.216,
    "l": 29.02
  },
  "oklch": {
    "l": 0.3048,
    "c": 0.15632,
    "h": 274.6
  },
  "luminance": 0.02417
}

Semantic roles & 50–950 ramp

primary

#1F197B

secondary

#A9AF40

accent

#E93FDF

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1F197B

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

Preview Lab → · Contrast checker → · Palette generator →