#1F28A0#1F28A0

#1F28A0 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.8% C 0.188 H 269.7°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#1F28A0
RGB	rgb(31, 40, 160)
HSL	hsl(236, 68%, 37%)
HSV	hsv(236, 81%, 63%)
CMYK	cmyk(80.6%, 75%, 0%, 37.3%)
CIE-LAB	lab(24.78, 40.24, -64.95)
CIE-LCH	lch(24.78, 76.41, 301.78°)
OKLab	oklab(36.84% -0.0009 -0.1882)
OKLCH	oklch(36.84% 0.188 269.7)
XYZ	xyz(7.6669, 4.3461, 33.6857)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F28A0 #A0971F

analogous

#1F68A0 #1F28A0 #571FA0

triadic

#1F28A0 #A01F28 #28A01F

tetradic

#1F28A0 #A01F68 #A0971F #1FA057

square

#1F28A0 #A01F68 #A0971F #1FA057

split-complementary

#1F28A0 #A0571F #68A01F

monochromatic

#0B0E39 #151B6D #1F28A0 #2935D3 #5A64DF

Accessibility & contrast

On white

11.23

#1F28A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1F28A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F28A0

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F28A0	#FFFFFF	#000000	##FFFFFF
##1F28A0	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041A3

Deuteranopia (green-blind)

#00349E

Tritanopia (blue-blind)

#004B62

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f28a0;
/* rgb */ color: rgb(31, 40, 160);
/* oklch */ color: oklch(36.8% 0.188 269.7);

Tailwind

colors: {
  custom: {
    50: '#7363bd',
    500: '#1f28a0',
    950: '#000000',
  },
}

SCSS

$custom: #1f28a0;
$custom-light: #7363bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f28a0",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 160
  },
  "hsl": {
    "h": 235.814,
    "s": 67.539,
    "l": 37.451
  },
  "oklch": {
    "l": 0.36842,
    "c": 0.18815,
    "h": 269.7
  },
  "luminance": 0.04347
}

Semantic roles & 50–950 ramp

primary

#1F28A0

secondary

#C3BC58

accent

#DE3DEA

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0512

muted

#7C7A81

Preview Lab

Preview with #1F28A0

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

Preview Lab → · Contrast checker → · Palette generator →