#1F255A#1F255A

#1F255A is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.3% C 0.094 H 274.1°. Best body text is #FFFFFF at 14.28:1 contrast (WCAG AA passes).

Color values

HEX	#1F255A
RGB	rgb(31, 37, 90)
HSL	hsl(234, 49%, 24%)
HSV	hsv(234, 66%, 35%)
CMYK	cmyk(65.6%, 58.9%, 0%, 64.7%)
CIE-LAB	lab(17.24, 16.00, -32.82)
CIE-LCH	lch(17.24, 36.51, 295.98°)
OKLab	oklab(29.28% 0.0068 -0.0942)
OKLCH	oklch(29.28% 0.094 274.1)
XYZ	xyz(3.0715, 2.3524, 9.9631)
Luminance	0.0235 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F255A #5A541F

analogous

#1F425A #1F255A #361F5A

triadic

#1F255A #5A1F25 #255A1F

tetradic

#1F255A #5A1F42 #5A541F #1F5A36

square

#1F255A #5A1F42 #5A541F #1F5A36

split-complementary

#1F255A #5A361F #425A1F

monochromatic

#080917 #0F122C #1F255A #2F3888 #3E4AB5

Accessibility & contrast

On white

14.28

#1F255A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1F255A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F255A

14.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F255A	#FFFFFF	#000000	##FFFFFF
##1F255A	1.00	14.28	1.47	14.28
#FFFFFF	14.28	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#022D5C

Deuteranopia (green-blind)

#002859

Tritanopia (blue-blind)

#00313B

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1f255a;
/* rgb */ color: rgb(31, 37, 90);
/* oklch */ color: oklch(29.3% 0.094 274.1);

Tailwind

colors: {
  custom: {
    50: '#625f89',
    500: '#1f255a',
    950: '#000000',
  },
}

SCSS

$custom: #1f255a;
$custom-light: #625f89;
$custom-dark: #000000;

JSON

{
  "hex": "#1f255a",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 90
  },
  "hsl": {
    "h": 233.898,
    "s": 48.76,
    "l": 23.725
  },
  "oklch": {
    "l": 0.29276,
    "c": 0.09441,
    "h": 274.1
  },
  "luminance": 0.02353
}

Semantic roles & 50–950 ramp

primary

#1F255A

secondary

#8F8746

accent

#CA4FD8

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05040B

muted

#7A797C

Preview Lab

Preview with #1F255A

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

Preview Lab → · Contrast checker → · Palette generator →