#1F1C8B#1F1C8B

#1F1C8B is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.7% C 0.174 H 272.5°. Best body text is #FFFFFF at 13.15:1 contrast (WCAG AA passes).

Color values

HEX	#1F1C8B
RGB	rgb(31, 28, 139)
HSL	hsl(242, 66%, 33%)
HSV	hsv(242, 80%, 55%)
CMYK	cmyk(77.7%, 79.9%, 0%, 45.5%)
CIE-LAB	lab(19.98, 39.90, -59.93)
CIE-LCH	lch(19.98, 72.00, 303.66°)
OKLab	oklab(32.75% 0.0075 -0.1735)
OKLCH	oklch(32.75% 0.174 272.5)
XYZ	xyz(5.6390, 2.9853, 24.7001)
Luminance	0.0299 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1C8B #888B1C

analogous

#1C508B #1F1C8B #571C8B

triadic

#1F1C8B #8B1F1C #1C8B1F

tetradic

#1F1C8B #8B1C50 #888B1C #1C8B57

square

#1F1C8B #8B1C50 #888B1C #1C8B57

split-complementary

#1F1C8B #8B571C #508B1C

monochromatic

#080725 #141258 #1F1C8B #2A26BE #4B47DA

Accessibility & contrast

On white

13.15

#1F1C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1F1C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1C8B

13.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1C8B	#FFFFFF	#000000	##FFFFFF
##1F1C8B	1.00	13.15	1.60	13.15
#FFFFFF	13.15	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368E

Deuteranopia (green-blind)

#002B89

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1f1c8b;
/* rgb */ color: rgb(31, 28, 139);
/* oklch */ color: oklch(32.7% 0.174 272.5);

Tailwind

colors: {
  custom: {
    50: '#6f5bae',
    500: '#1f1c8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f1c8b;
$custom-light: #6f5bae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1c8b",
  "rgb": {
    "r": 31,
    "g": 28,
    "b": 139
  },
  "hsl": {
    "h": 241.622,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.32749,
    "c": 0.17362,
    "h": 272.5
  },
  "luminance": 0.02986
}

Semantic roles & 50–950 ramp

primary

#1F1C8B

secondary

#B9BC47

accent

#E93EE5

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #1F1C8B

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

Preview Lab → · Contrast checker → · Palette generator →