#1F2B80#1F2B80

#1F2B80 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.0% C 0.143 H 270.4°. Best body text is #FFFFFF at 12.24:1 contrast (WCAG AA passes).

Color values

HEX	#1F2B80
RGB	rgb(31, 43, 128)
HSL	hsl(233, 61%, 31%)
HSV	hsv(233, 76%, 50%)
CMYK	cmyk(75.8%, 66.4%, 0%, 49.8%)
CIE-LAB	lab(22.22, 26.56, -49.34)
CIE-LCH	lch(22.22, 56.04, 298.30°)
OKLab	oklab(34.01% 0.0011 -0.1426)
OKLCH	oklch(34.01% 0.143 270.4)
XYZ	xyz(5.3239, 3.5770, 20.8277)
Luminance	0.0358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2B80 #80741F

analogous

#1F5B80 #1F2B80 #431F80

triadic

#1F2B80 #801F2B #2B801F

tetradic

#1F2B80 #801F5B #80741F #1F8043

square

#1F2B80 #801F5B #80741F #1F8043

split-complementary

#1F2B80 #80431F #5B801F

monochromatic

#070A1D #131A4F #1F2B80 #2B3CB1 #4758D2

Accessibility & contrast

On white

12.24

#1F2B80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1F2B80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2B80

12.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2B80	#FFFFFF	#000000	##FFFFFF
##1F2B80	1.00	12.24	1.72	12.24
#FFFFFF	12.24	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A83

Deuteranopia (green-blind)

#00317E

Tritanopia (blue-blind)

#004151

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f2b80;
/* rgb */ color: rgb(31, 43, 128);
/* oklch */ color: oklch(34.0% 0.143 270.4);

Tailwind

colors: {
  custom: {
    50: '#6a64a6',
    500: '#1f2b80',
    950: '#000000',
  },
}

SCSS

$custom: #1f2b80;
$custom-light: #6a64a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2b80",
  "rgb": {
    "r": 31,
    "g": 43,
    "b": 128
  },
  "hsl": {
    "h": 232.577,
    "s": 61.006,
    "l": 31.176
  },
  "oklch": {
    "l": 0.34007,
    "c": 0.14261,
    "h": 270.4
  },
  "luminance": 0.03578
}

Semantic roles & 50–950 ramp

primary

#1F2B80

secondary

#B3A648

accent

#D044E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #1F2B80

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

Preview Lab → · Contrast checker → · Palette generator →