#1F23A9#1F23A9

#1F23A9 is a dark, highly saturated blue. Relative luminance 0.044; OKLCH L 37.2% C 0.204 H 269.8°. Best body text is #FFFFFF at 11.22:1 contrast (WCAG AA passes).

Color values

HEX	#1F23A9
RGB	rgb(31, 35, 169)
HSL	hsl(238, 69%, 39%)
HSV	hsv(238, 82%, 66%)
CMYK	cmyk(81.7%, 79.3%, 0%, 33.7%)
CIE-LAB	lab(24.82, 46.11, -70.35)
CIE-LCH	lch(24.82, 84.11, 303.24°)
OKLab	oklab(37.17% -0.0008 -0.2038)
OKLCH	oklch(37.17% 0.204 269.8)
XYZ	xyz(8.3251, 4.3570, 37.9306)
Luminance	0.0436 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F23A9 #A9A51F

analogous

#1F68A9 #1F23A9 #601FA9

triadic

#1F23A9 #A91F23 #23A91F

tetradic

#1F23A9 #A91F68 #A9A51F #1FA960

square

#1F23A9 #A91F68 #A9A51F #1FA960

split-complementary

#1F23A9 #A9601F #68A91F

monochromatic

#0C0E42 #161875 #1F23A9 #2D32D8 #6064E2

Accessibility & contrast

On white

11.22

#1F23A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1F23A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F23A9

11.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F23A9	#FFFFFF	#000000	##FFFFFF
##1F23A9	1.00	11.22	1.87	11.22
#FFFFFF	11.22	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042AD

Deuteranopia (green-blind)

#0034A7

Tritanopia (blue-blind)

#004C66

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f23a9;
/* rgb */ color: rgb(31, 35, 169);
/* oklch */ color: oklch(37.2% 0.204 269.8);

Tailwind

colors: {
  custom: {
    50: '#7661c4',
    500: '#1f23a9',
    950: '#000000',
  },
}

SCSS

$custom: #1f23a9;
$custom-light: #7661c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f23a9",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 169
  },
  "hsl": {
    "h": 238.261,
    "s": 69,
    "l": 39.216
  },
  "oklch": {
    "l": 0.37165,
    "c": 0.20376,
    "h": 269.8
  },
  "luminance": 0.04358
}

Semantic roles & 50–950 ramp

primary

#1F23A9

secondary

#C7C45D

accent

#E73CEC

background

#F8F5FC

surface

#EFEAF8

border

#CAC6D1

text

#0A0513

muted

#7C7982

Preview Lab

Preview with #1F23A9

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

Preview Lab → · Contrast checker → · Palette generator →