#1F175B#1F175B

#1F175B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.6% C 0.116 H 280.4°. Best body text is #FFFFFF at 15.77:1 contrast (WCAG AA passes).

Color values

HEX	#1F175B
RGB	rgb(31, 23, 91)
HSL	hsl(247, 60%, 22%)
HSV	hsv(247, 75%, 36%)
CMYK	cmyk(65.9%, 74.7%, 0%, 64.3%)
CIE-LAB	lab(13.59, 26.14, -39.44)
CIE-LCH	lch(13.59, 47.31, 303.54°)
OKLab	oklab(26.63% 0.0209 -0.1137)
OKLCH	oklch(26.63% 0.116 280.4)
XYZ	xyz(2.7592, 1.6592, 10.0704)
Luminance	0.0166 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F175B #535B17

analogous

#17315B #1F175B #41175B

triadic

#1F175B #5B1F17 #175B1F

tetradic

#1F175B #5B1731 #535B17 #175B41

square

#1F175B #5B1731 #535B17 #175B41

split-complementary

#1F175B #5B4117 #315B17

monochromatic

#080618 #0E0B2A #1F175B #30238C #4030BD

Accessibility & contrast

On white

15.77

#1F175B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#1F175B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F175B

15.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F175B	#FFFFFF	#000000	##FFFFFF
##1F175B	1.00	15.77	1.33	15.77
#FFFFFF	15.77	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00255D

Deuteranopia (green-blind)

#00205A

Tritanopia (blue-blind)

#002937

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #1f175b;
/* rgb */ color: rgb(31, 23, 91);
/* oklch */ color: oklch(26.6% 0.116 280.4);

Tailwind

colors: {
  custom: {
    50: '#63558a',
    500: '#1f175b',
    950: '#000000',
  },
}

SCSS

$custom: #1f175b;
$custom-light: #63558a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f175b",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 91
  },
  "hsl": {
    "h": 247.059,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.26626,
    "c": 0.11558,
    "h": 280.4
  },
  "luminance": 0.01659
}

Semantic roles & 50–950 ramp

primary

#1F175B

secondary

#88923C

accent

#E345D0

background

#F6F4F8

surface

#EBE8F0

border

#C6C4CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #1F175B

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

Preview Lab → · Contrast checker → · Palette generator →