#1F1788#1F1788

#1F1788 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.8% C 0.174 H 273.3°. Best body text is #FFFFFF at 13.67:1 contrast (WCAG AA passes).

Color values

HEX	#1F1788
RGB	rgb(31, 23, 136)
HSL	hsl(244, 71%, 31%)
HSV	hsv(244, 83%, 53%)
CMYK	cmyk(77.2%, 83.1%, 0%, 46.7%)
CIE-LAB	lab(18.72, 41.54, -60.15)
CIE-LCH	lch(18.72, 73.10, 304.63°)
OKLab	oklab(31.76% 0.01 -0.174)
OKLCH	oklch(31.76% 0.174 273.3)
XYZ	xyz(5.3139, 2.6811, 23.5252)
Luminance	0.0268 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1788 #808817

analogous

#174788 #1F1788 #571788

triadic

#1F1788 #881F17 #17881F

tetradic

#1F1788 #881747 #808817 #178857

square

#1F1788 #881747 #808817 #178857

split-complementary

#1F1788 #885717 #478817

monochromatic

#07051F #130E54 #1F1788 #2B20BC #473BDE

Accessibility & contrast

On white

13.67

#1F1788 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1F1788 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1788

13.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1788	#FFFFFF	#000000	##FFFFFF
##1F1788	1.00	13.67	1.54	13.67
#FFFFFF	13.67	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338B

Deuteranopia (green-blind)

#002886

Tritanopia (blue-blind)

#003B50

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f1788;
/* rgb */ color: rgb(31, 23, 136);
/* oklch */ color: oklch(31.8% 0.174 273.3);

Tailwind

colors: {
  custom: {
    50: '#6f58ac',
    500: '#1f1788',
    950: '#000000',
  },
}

SCSS

$custom: #1f1788;
$custom-light: #6f58ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1788",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 136
  },
  "hsl": {
    "h": 244.248,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.3176,
    "c": 0.1743,
    "h": 273.3
  },
  "luminance": 0.02682
}

Semantic roles & 50–950 ramp

primary

#1F1788

secondary

#B3BC3F

accent

#EE3AE1

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1F1788

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

Preview Lab → · Contrast checker → · Palette generator →