#1F23A8#1F23A8

#1F23A8 is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.0% C 0.203 H 269.8°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#1F23A8
RGB	rgb(31, 35, 168)
HSL	hsl(238, 69%, 39%)
HSV	hsv(238, 82%, 66%)
CMYK	cmyk(81.5%, 79.2%, 0%, 34.1%)
CIE-LAB	lab(24.70, 45.78, -69.94)
CIE-LCH	lch(24.70, 83.59, 303.21°)
OKLab	oklab(37.05% -0.0007 -0.2026)
OKLCH	oklch(37.05% 0.203 269.8)
XYZ	xyz(8.2316, 4.3196, 37.4381)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F23A8 #A8A41F

analogous

#1F68A8 #1F23A8 #601FA8

triadic

#1F23A8 #A81F23 #23A81F

tetradic

#1F23A8 #A81F68 #A8A41F #1FA860

square

#1F23A8 #A81F68 #A8A41F #1FA860

split-complementary

#1F23A8 #A8601F #68A81F

monochromatic

#0C0D41 #151874 #1F23A8 #2C31D8 #6064E2

Accessibility & contrast

On white

11.26

#1F23A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1F23A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F23A8

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F23A8	#FFFFFF	#000000	##FFFFFF
##1F23A8	1.00	11.26	1.86	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041AC

Deuteranopia (green-blind)

#0033A6

Tritanopia (blue-blind)

#004C65

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f23a8;
/* rgb */ color: rgb(31, 35, 168);
/* oklch */ color: oklch(37.0% 0.203 269.8);

Tailwind

colors: {
  custom: {
    50: '#7660c3',
    500: '#1f23a8',
    950: '#000000',
  },
}

SCSS

$custom: #1f23a8;
$custom-light: #7660c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f23a8",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 168
  },
  "hsl": {
    "h": 238.248,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.37049,
    "c": 0.20257,
    "h": 269.8
  },
  "luminance": 0.04321
}

Semantic roles & 50–950 ramp

primary

#1F23A8

secondary

#C6C35D

accent

#E73CEC

background

#F8F5FC

surface

#EFEAF8

border

#CAC6D1

text

#0A0513

muted

#7C7982

Preview Lab

Preview with #1F23A8

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

Preview Lab → · Contrast checker → · Palette generator →