#1F176B#1F176B

#1F176B is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.4% C 0.138 H 277.3°. Best body text is #FFFFFF at 15.07:1 contrast (WCAG AA passes).

Color values

HEX	#1F176B
RGB	rgb(31, 23, 107)
HSL	hsl(246, 65%, 25%)
HSV	hsv(246, 79%, 42%)
CMYK	cmyk(71%, 78.5%, 0%, 58%)
CIE-LAB	lab(15.30, 31.80, -47.21)
CIE-LCH	lch(15.30, 56.93, 303.96°)
OKLab	oklab(28.37% 0.0174 -0.1364)
OKLCH	oklch(28.37% 0.138 277.3)
XYZ	xyz(3.5245, 1.9653, 14.1007)
Luminance	0.0197 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F176B #636B17

analogous

#17396B #1F176B #49176B

triadic

#1F176B #6B1F17 #176B1F

tetradic

#1F176B #6B1739 #636B17 #176B49

square

#1F176B #6B1739 #636B17 #176B49

split-complementary

#1F176B #6B4917 #396B17

monochromatic

#070519 #100C39 #1F176B #2E229D #3C2DD0

Accessibility & contrast

On white

15.07

#1F176B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#1F176B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F176B

15.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F176B	#FFFFFF	#000000	##FFFFFF
##1F176B	1.00	15.07	1.39	15.07
#FFFFFF	15.07	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A6D

Deuteranopia (green-blind)

#002369

Tritanopia (blue-blind)

#002F40

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1f176b;
/* rgb */ color: rgb(31, 23, 107);
/* oklch */ color: oklch(28.4% 0.138 277.3);

Tailwind

colors: {
  custom: {
    50: '#675696',
    500: '#1f176b',
    950: '#000000',
  },
}

SCSS

$custom: #1f176b;
$custom-light: #675696;
$custom-dark: #000000;

JSON

{
  "hex": "#1f176b",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 107
  },
  "hsl": {
    "h": 245.714,
    "s": 64.615,
    "l": 25.49
  },
  "oklch": {
    "l": 0.28367,
    "c": 0.13752,
    "h": 277.3
  },
  "luminance": 0.01966
}

Semantic roles & 50–950 ramp

primary

#1F176B

secondary

#98A13D

accent

#E840D8

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030D

muted

#7A787E

Preview Lab

Preview with #1F176B

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

Preview Lab → · Contrast checker → · Palette generator →