#1F177E#1F177E

#1F177E is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.6% C 0.162 H 274.5°. Best body text is #FFFFFF at 14.17:1 contrast (WCAG AA passes).

Color values

HEX	#1F177E
RGB	rgb(31, 23, 126)
HSL	hsl(245, 69%, 29%)
HSV	hsv(245, 82%, 49%)
CMYK	cmyk(75.4%, 81.7%, 0%, 50.6%)
CIE-LAB	lab(17.51, 38.26, -55.84)
CIE-LCH	lch(17.51, 67.69, 304.42°)
OKLab	oklab(30.56% 0.0126 -0.1615)
OKLCH	oklch(30.56% 0.162 274.5)
XYZ	xyz(4.6361, 2.4100, 19.9555)
Luminance	0.0241 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F177E #767E17

analogous

#17437E #1F177E #53177E

triadic

#1F177E #7E1F17 #177E1F

tetradic

#1F177E #7E1743 #767E17 #177E53

square

#1F177E #7E1743 #767E17 #177E53

split-complementary

#1F177E #7E5317 #437E17

monochromatic

#06051A #120E4A #1F177E #2C20B2 #4235DA

Accessibility & contrast

On white

14.17

#1F177E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#1F177E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F177E

14.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F177E	#FFFFFF	#000000	##FFFFFF
##1F177E	1.00	14.17	1.48	14.17
#FFFFFF	14.17	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003081

Deuteranopia (green-blind)

#00267C

Tritanopia (blue-blind)

#00374A

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #1f177e;
/* rgb */ color: rgb(31, 23, 126);
/* oklch */ color: oklch(30.6% 0.162 274.5);

Tailwind

colors: {
  custom: {
    50: '#6c57a5',
    500: '#1f177e',
    950: '#000000',
  },
}

SCSS

$custom: #1f177e;
$custom-light: #6c57a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f177e",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 126
  },
  "hsl": {
    "h": 244.66,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.30564,
    "c": 0.16198,
    "h": 274.5
  },
  "luminance": 0.0241
}

Semantic roles & 50–950 ramp

primary

#1F177E

secondary

#AAB33E

accent

#EC3CDE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1F177E

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

Preview Lab → · Contrast checker → · Palette generator →