#1F175E#1F175E

#1F175E is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.9% C 0.120 H 279.8°. Best body text is #FFFFFF at 15.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F175E
RGB	rgb(31, 23, 94)
HSL	hsl(247, 61%, 23%)
HSV	hsv(247, 76%, 37%)
CMYK	cmyk(67%, 75.5%, 0%, 63.1%)
CIE-LAB	lab(13.90, 27.22, -40.94)
CIE-LCH	lch(13.90, 49.16, 303.62°)
OKLab	oklab(26.94% 0.0203 -0.1181)
OKLCH	oklch(26.94% 0.12 279.8)
XYZ	xyz(2.8912, 1.7120, 10.7656)
Luminance	0.0171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F175E #565E17

analogous

#17325E #1F175E #43175E

triadic

#1F175E #5E1F17 #175E1F

tetradic

#1F175E #5E1732 #565E17 #175E43

square

#1F175E #5E1732 #565E17 #175E43

split-complementary

#1F175E #5E4317 #325E17

monochromatic

#080619 #0F0B2D #1F175E #2F238F #3F2FC0

Accessibility & contrast

On white

15.64

#1F175E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#1F175E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F175E

15.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F175E	#FFFFFF	#000000	##FFFFFF
##1F175E	1.00	15.64	1.34	15.64
#FFFFFF	15.64	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002660

Deuteranopia (green-blind)

#00215D

Tritanopia (blue-blind)

#002A38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #1f175e;
/* rgb */ color: rgb(31, 23, 94);
/* oklch */ color: oklch(26.9% 0.120 279.8);

Tailwind

colors: {
  custom: {
    50: '#64558c',
    500: '#1f175e',
    950: '#000000',
  },
}

SCSS

$custom: #1f175e;
$custom-light: #64558c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f175e",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 94
  },
  "hsl": {
    "h": 246.761,
    "s": 60.684,
    "l": 22.941
  },
  "oklch": {
    "l": 0.26943,
    "c": 0.1198,
    "h": 279.8
  },
  "luminance": 0.01712
}

Semantic roles & 50–950 ramp

primary

#1F175E

secondary

#8B953C

accent

#E444D2

background

#F6F5F8

surface

#EBE8F0

border

#C6C4CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #1F175E

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

Preview Lab → · Contrast checker → · Palette generator →