#1F175A#1F175A

#1F175A is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.5% C 0.114 H 280.6°. Best body text is #FFFFFF at 15.81:1 contrast (WCAG AA passes).

Color values

HEX	#1F175A
RGB	rgb(31, 23, 90)
HSL	hsl(247, 59%, 22%)
HSV	hsv(247, 74%, 35%)
CMYK	cmyk(65.6%, 74.4%, 0%, 64.7%)
CIE-LAB	lab(13.48, 25.78, -38.93)
CIE-LCH	lch(13.48, 46.69, 303.51°)
OKLab	oklab(26.52% 0.0211 -0.1122)
OKLCH	oklch(26.52% 0.114 280.6)
XYZ	xyz(2.7164, 1.6421, 9.8447)
Luminance	0.0164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F175A #525A17

analogous

#17315A #1F175A #41175A

triadic

#1F175A #5A1F17 #175A1F

tetradic

#1F175A #5A1731 #525A17 #175A41

square

#1F175A #5A1731 #525A17 #175A41

split-complementary

#1F175A #5A4117 #315A17

monochromatic

#080618 #0E0B29 #1F175A #30238B #4130BB

Accessibility & contrast

On white

15.81

#1F175A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#1F175A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F175A

15.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F175A	#FFFFFF	#000000	##FFFFFF
##1F175A	1.00	15.81	1.33	15.81
#FFFFFF	15.81	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00255C

Deuteranopia (green-blind)

#002059

Tritanopia (blue-blind)

#002936

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #1f175a;
/* rgb */ color: rgb(31, 23, 90);
/* oklch */ color: oklch(26.5% 0.114 280.6);

Tailwind

colors: {
  custom: {
    50: '#635589',
    500: '#1f175a',
    950: '#000000',
  },
}

SCSS

$custom: #1f175a;
$custom-light: #635589;
$custom-dark: #000000;

JSON

{
  "hex": "#1f175a",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 90
  },
  "hsl": {
    "h": 247.164,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.26521,
    "c": 0.11416,
    "h": 280.6
  },
  "luminance": 0.01642
}

Semantic roles & 50–950 ramp

primary

#1F175A

secondary

#87913C

accent

#E245D0

background

#F6F4F8

surface

#EBE8F0

border

#C6C4CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #1F175A

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

Preview Lab → · Contrast checker → · Palette generator →