#1F28A9#1F28A9

#1F28A9 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.8% C 0.199 H 269.3°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#1F28A9
RGB	rgb(31, 40, 169)
HSL	hsl(236, 69%, 39%)
HSV	hsv(236, 82%, 66%)
CMYK	cmyk(81.7%, 76.3%, 0%, 33.7%)
CIE-LAB	lab(25.78, 43.36, -68.76)
CIE-LCH	lch(25.78, 81.28, 302.24°)
OKLab	oklab(37.84% -0.0023 -0.1992)
OKLCH	oklch(37.84% 0.199 269.3)
XYZ	xyz(8.4828, 4.6725, 37.9832)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F28A9 #A9A01F

analogous

#1F6DA9 #1F28A9 #5B1FA9

triadic

#1F28A9 #A91F28 #28A91F

tetradic

#1F28A9 #A91F6D #A9A01F #1FA95B

square

#1F28A9 #A91F6D #A9A01F #1FA95B

split-complementary

#1F28A9 #A95B1F #6DA91F

monochromatic

#0C1042 #161C75 #1F28A9 #2D38D8 #6069E2

Accessibility & contrast

On white

10.85

#1F28A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F28A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F28A9

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F28A9	#FFFFFF	#000000	##FFFFFF
##1F28A9	1.00	10.85	1.93	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044AD

Deuteranopia (green-blind)

#0036A7

Tritanopia (blue-blind)

#004F67

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f28a9;
/* rgb */ color: rgb(31, 40, 169);
/* oklch */ color: oklch(37.8% 0.199 269.3);

Tailwind

colors: {
  custom: {
    50: '#7664c4',
    500: '#1f28a9',
    950: '#000000',
  },
}

SCSS

$custom: #1f28a9;
$custom-light: #7664c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f28a9",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 169
  },
  "hsl": {
    "h": 236.087,
    "s": 69,
    "l": 39.216
  },
  "oklch": {
    "l": 0.37843,
    "c": 0.19921,
    "h": 269.3
  },
  "luminance": 0.04673
}

Semantic roles & 50–950 ramp

primary

#1F28A9

secondary

#C7C05D

accent

#E03CEC

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0513

muted

#7C7A82

Preview Lab

Preview with #1F28A9

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

Preview Lab → · Contrast checker → · Palette generator →