#1F257A#1F257A

#1F257A is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.3% C 0.142 H 272.3°. Best body text is #FFFFFF at 13.09:1 contrast (WCAG AA passes).

Color values

HEX	#1F257A
RGB	rgb(31, 37, 122)
HSL	hsl(236, 59%, 30%)
HSV	hsv(236, 75%, 48%)
CMYK	cmyk(74.6%, 69.7%, 0%, 52.2%)
CIE-LAB	lab(20.12, 28.33, -48.98)
CIE-LCH	lch(20.12, 56.58, 300.05°)
OKLab	oklab(32.3% 0.0057 -0.1416)
OKLCH	oklch(32.3% 0.142 272.3)
XYZ	xyz(4.7383, 3.0191, 18.7416)
Luminance	0.0302 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F257A #7A741F

analogous

#1F527A #1F257A #471F7A

triadic

#1F257A #7A1F25 #257A1F

tetradic

#1F257A #7A1F52 #7A741F #1F7A47

square

#1F257A #7A1F52 #7A741F #1F7A47

split-complementary

#1F257A #7A471F #527A1F

monochromatic

#060718 #131649 #1F257A #2B34AB #444DCF

Accessibility & contrast

On white

13.09

#1F257A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1F257A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F257A

13.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F257A	#FFFFFF	#000000	##FFFFFF
##1F257A	1.00	13.09	1.60	13.09
#FFFFFF	13.09	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00357D

Deuteranopia (green-blind)

#002C78

Tritanopia (blue-blind)

#003C4C

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f257a;
/* rgb */ color: rgb(31, 37, 122);
/* oklch */ color: oklch(32.3% 0.142 272.3);

Tailwind

colors: {
  custom: {
    50: '#6960a1',
    500: '#1f257a',
    950: '#000000',
  },
}

SCSS

$custom: #1f257a;
$custom-light: #6960a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f257a",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 122
  },
  "hsl": {
    "h": 236.044,
    "s": 59.477,
    "l": 30
  },
  "oklch": {
    "l": 0.32296,
    "c": 0.1417,
    "h": 272.3
  },
  "luminance": 0.0302
}

Semantic roles & 50–950 ramp

primary

#1F257A

secondary

#ADA747

accent

#D845E3

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1F257A

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

Preview Lab → · Contrast checker → · Palette generator →