#1F239E#1F239E

#1F239E is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.9% C 0.191 H 270.4°. Best body text is #FFFFFF at 11.72:1 contrast (WCAG AA passes).

Color values

HEX	#1F239E
RGB	rgb(31, 35, 158)
HSL	hsl(238, 67%, 37%)
HSV	hsv(238, 80%, 62%)
CMYK	cmyk(80.4%, 77.8%, 0%, 38%)
CIE-LAB	lab(23.54, 42.44, -65.78)
CIE-LCH	lch(23.54, 78.28, 302.83°)
OKLab	oklab(35.9% 0.0012 -0.1905)
OKLCH	oklch(35.9% 0.191 270.4)
XYZ	xyz(7.3356, 3.9612, 32.7191)
Luminance	0.0396 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F239E #9E9A1F

analogous

#1F639E #1F239E #5A1F9E

triadic

#1F239E #9E1F23 #239E1F

tetradic

#1F239E #9E1F63 #9E9A1F #1F9E5A

square

#1F239E #9E1F63 #9E9A1F #1F9E5A

split-complementary

#1F239E #9E5A1F #639E1F

monochromatic

#0B0C38 #15186B #1F239E #292ED1 #595DDE

Accessibility & contrast

On white

11.72

#1F239E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1F239E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F239E

11.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F239E	#FFFFFF	#000000	##FFFFFF
##1F239E	1.00	11.72	1.79	11.72
#FFFFFF	11.72	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA1

Deuteranopia (green-blind)

#00329C

Tritanopia (blue-blind)

#00485F

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f239e;
/* rgb */ color: rgb(31, 35, 158);
/* oklch */ color: oklch(35.9% 0.191 270.4);

Tailwind

colors: {
  custom: {
    50: '#7360bc',
    500: '#1f239e',
    950: '#000000',
  },
}

SCSS

$custom: #1f239e;
$custom-light: #7360bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f239e",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 158
  },
  "hsl": {
    "h": 238.11,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.35896,
    "c": 0.19052,
    "h": 270.4
  },
  "luminance": 0.03962
}

Semantic roles & 50–950 ramp

primary

#1F239E

secondary

#C2BF56

accent

#E53EEA

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #1F239E

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

Preview Lab → · Contrast checker → · Palette generator →