#1F175F#1F175F

#1F175F is a dark, vivid blue. Relative luminance 0.017; OKLCH L 27.1% C 0.121 H 279.5°. Best body text is #FFFFFF at 15.60:1 contrast (WCAG AA passes).

Color values

HEX	#1F175F
RGB	rgb(31, 23, 95)
HSL	hsl(247, 61%, 23%)
HSV	hsv(247, 76%, 37%)
CMYK	cmyk(67.4%, 75.8%, 0%, 62.7%)
CIE-LAB	lab(14.00, 27.57, -41.43)
CIE-LCH	lch(14.00, 49.77, 303.64°)
OKLab	oklab(27.05% 0.0201 -0.1195)
OKLCH	oklch(27.05% 0.121 279.5)
XYZ	xyz(2.9364, 1.7301, 11.0035)
Luminance	0.0173 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F175F #575F17

analogous

#17335F #1F175F #43175F

triadic

#1F175F #5F1F17 #175F1F

tetradic

#1F175F #5F1733 #575F17 #175F43

square

#1F175F #5F1733 #575F17 #175F43

split-complementary

#1F175F #5F4317 #335F17

monochromatic

#080619 #0F0B2E #1F175F #2F2390 #3F2FC2

Accessibility & contrast

On white

15.60

#1F175F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#1F175F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F175F

15.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F175F	#FFFFFF	#000000	##FFFFFF
##1F175F	1.00	15.60	1.35	15.60
#FFFFFF	15.60	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002661

Deuteranopia (green-blind)

#00215E

Tritanopia (blue-blind)

#002B39

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #1f175f;
/* rgb */ color: rgb(31, 23, 95);
/* oklch */ color: oklch(27.1% 0.121 279.5);

Tailwind

colors: {
  custom: {
    50: '#64558d',
    500: '#1f175f',
    950: '#000000',
  },
}

SCSS

$custom: #1f175f;
$custom-light: #64558d;
$custom-dark: #000000;

JSON

{
  "hex": "#1f175f",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 95
  },
  "hsl": {
    "h": 246.667,
    "s": 61.017,
    "l": 23.137
  },
  "oklch": {
    "l": 0.2705,
    "c": 0.1212,
    "h": 279.5
  },
  "luminance": 0.0173
}

Semantic roles & 50–950 ramp

primary

#1F175F

secondary

#8C963C

accent

#E444D2

background

#F6F5F8

surface

#EBE8F0

border

#C6C4CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #1F175F

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

Preview Lab → · Contrast checker → · Palette generator →