#1F23B0#1F23B0

#1F23B0 is a dark, highly saturated blue. Relative luminance 0.046; OKLCH L 38.0% C 0.212 H 269.4°. Best body text is #FFFFFF at 10.91:1 contrast (WCAG AA passes).

Color values

HEX	#1F23B0
RGB	rgb(31, 35, 176)
HSL	hsl(238, 70%, 41%)
HSV	hsv(238, 82%, 69%)
CMYK	cmyk(82.4%, 80.1%, 0%, 31%)
CIE-LAB	lab(25.64, 48.39, -73.19)
CIE-LCH	lch(25.64, 87.74, 303.47°)
OKLab	oklab(37.98% -0.0022 -0.212)
OKLCH	oklch(37.98% 0.212 269.4)
XYZ	xyz(8.9999, 4.6269, 41.4846)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F23B0 #B0AC1F

analogous

#1F6BB0 #1F23B0 #631FB0

triadic

#1F23B0 #B01F23 #23B01F

tetradic

#1F23B0 #B01F6B #B0AC1F #1FB063

square

#1F23B0 #B01F6B #B0AC1F #1FB063

split-complementary

#1F23B0 #B0631F #6BB01F

monochromatic

#0D0E48 #16197C #1F23B0 #3136DB #6569E4

Accessibility & contrast

On white

10.91

#1F23B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F23B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F23B0

10.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F23B0	#FFFFFF	#000000	##FFFFFF
##1F23B0	1.00	10.91	1.93	10.91
#FFFFFF	10.91	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B4

Deuteranopia (green-blind)

#0035AE

Tritanopia (blue-blind)

#004F6A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f23b0;
/* rgb */ color: rgb(31, 35, 176);
/* oklch */ color: oklch(38.0% 0.212 269.4);

Tailwind

colors: {
  custom: {
    50: '#7861c9',
    500: '#1f23b0',
    950: '#000000',
  },
}

SCSS

$custom: #1f23b0;
$custom-light: #7861c9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f23b0",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 176
  },
  "hsl": {
    "h": 238.345,
    "s": 70.048,
    "l": 40.588
  },
  "oklch": {
    "l": 0.37982,
    "c": 0.21199,
    "h": 269.4
  },
  "luminance": 0.04628
}

Semantic roles & 50–950 ramp

primary

#1F23B0

secondary

#C9C662

accent

#E83BED

background

#F8F5FC

surface

#EFEAF8

border

#CAC6D1

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #1F23B0

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

Preview Lab → · Contrast checker → · Palette generator →