#1F42A8#1F42A8

#1F42A8 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.2% C 0.169 H 265.2°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#1F42A8
RGB	rgb(31, 66, 168)
HSL	hsl(225, 69%, 39%)
HSV	hsv(225, 82%, 66%)
CMYK	cmyk(81.5%, 60.7%, 0%, 34.1%)
CIE-LAB	lab(31.84, 26.48, -58.19)
CIE-LCH	lch(31.84, 63.93, 294.47°)
OKLab	oklab(42.23% -0.0142 -0.1683)
OKLCH	oklch(42.23% 0.169 265.2)
XYZ	xyz(9.5787, 7.0137, 37.8871)
Luminance	0.0702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F42A8 #A8851F

analogous

#1F87A8 #1F42A8 #411FA8

triadic

#1F42A8 #A81F42 #42A81F

tetradic

#1F42A8 #A81F87 #A8851F #1FA841

square

#1F42A8 #A81F87 #A8851F #1FA841

split-complementary

#1F42A8 #A8411F #87A81F

monochromatic

#0C1941 #152E74 #1F42A8 #2C58D8 #6081E2

Accessibility & contrast

On white

8.74

#1F42A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#1F42A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F42A8

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F42A8	#FFFFFF	#000000	##FFFFFF
##1F42A8	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AB

Deuteranopia (green-blind)

#0045A6

Tritanopia (blue-blind)

#005C6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1f42a8;
/* rgb */ color: rgb(31, 66, 168);
/* oklch */ color: oklch(42.2% 0.169 265.2);

Tailwind

colors: {
  custom: {
    50: '#7375c3',
    500: '#1f42a8',
    950: '#000000',
  },
}

SCSS

$custom: #1f42a8;
$custom-light: #7375c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f42a8",
  "rgb": {
    "r": 31,
    "g": 66,
    "b": 168
  },
  "hsl": {
    "h": 224.672,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.42228,
    "c": 0.16889,
    "h": 265.2
  },
  "luminance": 0.07015
}

Semantic roles & 50–950 ramp

primary

#1F42A8

secondary

#C6AB5D

accent

#BF3CEC

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1F42A8

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

Preview Lab → · Contrast checker → · Palette generator →