#1F236B#1F236B

#1F236B is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.4% C 0.123 H 274.0°. Best body text is #FFFFFF at 13.90:1 contrast (WCAG AA passes).

Color values

HEX	#1F236B
RGB	rgb(31, 35, 107)
HSL	hsl(237, 55%, 27%)
HSV	hsv(237, 71%, 42%)
CMYK	cmyk(71%, 67.3%, 0%, 58%)
CIE-LAB	lab(18.16, 24.00, -42.52)
CIE-LCH	lch(18.16, 48.82, 299.44°)
OKLab	oklab(30.43% 0.0085 -0.1227)
OKLCH	oklch(30.43% 0.123 274)
XYZ	xyz(3.8191, 2.5546, 14.1989)
Luminance	0.0255 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F236B #6B671F

analogous

#1F496B #1F236B #411F6B

triadic

#1F236B #6B1F23 #236B1F

tetradic

#1F236B #6B1F49 #6B671F #1F6B41

square

#1F236B #6B1F49 #6B671F #1F6B41

split-complementary

#1F236B #6B411F #496B1F

monochromatic

#070818 #11133C #1F236B #2D339A #3D45C7

Accessibility & contrast

On white

13.90

#1F236B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1F236B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F236B

13.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F236B	#FFFFFF	#000000	##FFFFFF
##1F236B	1.00	13.90	1.51	13.90
#FFFFFF	13.90	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00306D

Deuteranopia (green-blind)

#00296A

Tritanopia (blue-blind)

#003643

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1f236b;
/* rgb */ color: rgb(31, 35, 107);
/* oklch */ color: oklch(30.4% 0.123 274.0);

Tailwind

colors: {
  custom: {
    50: '#665e96',
    500: '#1f236b',
    950: '#000000',
  },
}

SCSS

$custom: #1f236b;
$custom-light: #665e96;
$custom-dark: #000000;

JSON

{
  "hex": "#1f236b",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 107
  },
  "hsl": {
    "h": 236.842,
    "s": 55.072,
    "l": 27.059
  },
  "oklch": {
    "l": 0.30425,
    "c": 0.12298,
    "h": 274
  },
  "luminance": 0.02555
}

Semantic roles & 50–950 ramp

primary

#1F236B

secondary

#9F9B47

accent

#D749DE

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040D

muted

#7A797E

Preview Lab

Preview with #1F236B

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

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