#1F23A6#1F23A6

#1F23A6 is a dark, highly saturated blue. Relative luminance 0.042; OKLCH L 36.8% C 0.200 H 269.9°. Best body text is #FFFFFF at 11.36:1 contrast (WCAG AA passes).

Color values

HEX	#1F23A6
RGB	rgb(31, 35, 166)
HSL	hsl(238, 69%, 39%)
HSV	hsv(238, 81%, 65%)
CMYK	cmyk(81.3%, 78.9%, 0%, 34.9%)
CIE-LAB	lab(24.47, 45.12, -69.12)
CIE-LCH	lch(24.47, 82.54, 303.14°)
OKLab	oklab(36.82% -0.0003 -0.2002)
OKLCH	oklch(36.82% 0.2 269.9)
XYZ	xyz(8.0467, 4.2456, 36.4644)
Luminance	0.0425 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F23A6 #A6A21F

analogous

#1F66A6 #1F23A6 #5E1FA6

triadic

#1F23A6 #A61F23 #23A61F

tetradic

#1F23A6 #A61F66 #A6A21F #1FA65E

square

#1F23A6 #A61F66 #A6A21F #1FA65E

split-complementary

#1F23A6 #A65E1F #66A61F

monochromatic

#0C0D3F #151872 #1F23A6 #2B30D7 #5E62E1

Accessibility & contrast

On white

11.36

#1F23A6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1F23A6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F23A6

11.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F23A6	#FFFFFF	#000000	##FFFFFF
##1F23A6	1.00	11.36	1.85	11.36
#FFFFFF	11.36	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041AA

Deuteranopia (green-blind)

#0033A4

Tritanopia (blue-blind)

#004B64

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f23a6;
/* rgb */ color: rgb(31, 35, 166);
/* oklch */ color: oklch(36.8% 0.200 269.9);

Tailwind

colors: {
  custom: {
    50: '#7560c2',
    500: '#1f23a6',
    950: '#000000',
  },
}

SCSS

$custom: #1f23a6;
$custom-light: #7560c2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f23a6",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 166
  },
  "hsl": {
    "h": 238.222,
    "s": 68.528,
    "l": 38.627
  },
  "oklch": {
    "l": 0.36817,
    "c": 0.20019,
    "h": 269.9
  },
  "luminance": 0.04247
}

Semantic roles & 50–950 ramp

primary

#1F23A6

secondary

#C5C25B

accent

#E63CEB

background

#F7F5FC

surface

#EEEAF8

border

#C9C6D1

text

#0A0513

muted

#7C7982

Preview Lab

Preview with #1F23A6

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

Preview Lab → · Contrast checker → · Palette generator →