#1F28A8#1F28A8

#1F28A8 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 37.7% C 0.198 H 269.4°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#1F28A8
RGB	rgb(31, 40, 168)
HSL	hsl(236, 69%, 39%)
HSV	hsv(236, 82%, 66%)
CMYK	cmyk(81.5%, 76.2%, 0%, 34.1%)
CIE-LAB	lab(25.67, 43.01, -68.34)
CIE-LCH	lch(25.67, 80.75, 302.19°)
OKLab	oklab(37.73% -0.0021 -0.198)
OKLCH	oklch(37.73% 0.198 269.4)
XYZ	xyz(8.3893, 4.6351, 37.4907)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F28A8 #A89F1F

analogous

#1F6DA8 #1F28A8 #5B1FA8

triadic

#1F28A8 #A81F28 #28A81F

tetradic

#1F28A8 #A81F6D #A89F1F #1FA85B

square

#1F28A8 #A81F6D #A89F1F #1FA85B

split-complementary

#1F28A8 #A85B1F #6DA81F

monochromatic

#0C0F41 #151C74 #1F28A8 #2C37D8 #6068E2

Accessibility & contrast

On white

10.90

#1F28A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F28A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F28A8

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F28A8	#FFFFFF	#000000	##FFFFFF
##1F28A8	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044AC

Deuteranopia (green-blind)

#0036A6

Tritanopia (blue-blind)

#004E66

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f28a8;
/* rgb */ color: rgb(31, 40, 168);
/* oklch */ color: oklch(37.7% 0.198 269.4);

Tailwind

colors: {
  custom: {
    50: '#7564c3',
    500: '#1f28a8',
    950: '#000000',
  },
}

SCSS

$custom: #1f28a8;
$custom-light: #7564c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f28a8",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 168
  },
  "hsl": {
    "h": 236.058,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.37731,
    "c": 0.19799,
    "h": 269.4
  },
  "luminance": 0.04636
}

Semantic roles & 50–950 ramp

primary

#1F28A8

secondary

#C6BF5D

accent

#E03CEC

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0513

muted

#7C7A82

Preview Lab

Preview with #1F28A8

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

Preview Lab → · Contrast checker → · Palette generator →