#1F28A6#1F28A6

#1F28A6 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 37.5% C 0.196 H 269.5°. Best body text is #FFFFFF at 10.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F28A6
RGB	rgb(31, 40, 166)
HSL	hsl(236, 69%, 39%)
HSV	hsv(236, 81%, 65%)
CMYK	cmyk(81.3%, 75.9%, 0%, 34.9%)
CIE-LAB	lab(25.45, 42.33, -67.50)
CIE-LCH	lch(25.45, 79.67, 302.09°)
OKLab	oklab(37.51% -0.0018 -0.1955)
OKLCH	oklch(37.51% 0.196 269.5)
XYZ	xyz(8.2044, 4.5611, 36.5170)
Luminance	0.0456 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F28A6 #A69D1F

analogous

#1F6BA6 #1F28A6 #591FA6

triadic

#1F28A6 #A61F28 #28A61F

tetradic

#1F28A6 #A61F6B #A69D1F #1FA659

square

#1F28A6 #A61F6B #A69D1F #1FA659

split-complementary

#1F28A6 #A6591F #6BA61F

monochromatic

#0C0F3F #151C72 #1F28A6 #2B36D7 #5E67E1

Accessibility & contrast

On white

10.98

#1F28A6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1F28A6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F28A6

10.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F28A6	#FFFFFF	#000000	##FFFFFF
##1F28A6	1.00	10.98	1.91	10.98
#FFFFFF	10.98	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043AA

Deuteranopia (green-blind)

#0035A4

Tritanopia (blue-blind)

#004D65

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f28a6;
/* rgb */ color: rgb(31, 40, 166);
/* oklch */ color: oklch(37.5% 0.196 269.5);

Tailwind

colors: {
  custom: {
    50: '#7563c2',
    500: '#1f28a6',
    950: '#000000',
  },
}

SCSS

$custom: #1f28a6;
$custom-light: #7563c2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f28a6",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 166
  },
  "hsl": {
    "h": 236,
    "s": 68.528,
    "l": 38.627
  },
  "oklch": {
    "l": 0.37508,
    "c": 0.19555,
    "h": 269.5
  },
  "luminance": 0.04562
}

Semantic roles & 50–950 ramp

primary

#1F28A6

secondary

#C5BE5B

accent

#E03CEB

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0513

muted

#7C7A82

Preview Lab

Preview with #1F28A6

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

Preview Lab → · Contrast checker → · Palette generator →