#1F128F#1F128F

#1F128F is a dark, vivid blue. Relative luminance 0.027; OKLCH L 32.1% C 0.186 H 272.9°. Best body text is #FFFFFF at 13.62:1 contrast (WCAG AA passes).

Color values

HEX	#1F128F
RGB	rgb(31, 18, 143)
HSL	hsl(246, 78%, 32%)
HSV	hsv(246, 87%, 56%)
CMYK	cmyk(78.3%, 87.4%, 0%, 43.9%)
CIE-LAB	lab(18.83, 46.02, -64.35)
CIE-LCH	lch(18.83, 79.11, 305.57°)
OKLab	oklab(32.09% 0.0095 -0.1861)
OKLCH	oklch(32.09% 0.186 272.9)
XYZ	xyz(5.7377, 2.7065, 26.2013)
Luminance	0.0271 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F128F #828F12

analogous

#12448F #1F128F #5E128F

triadic

#1F128F #8F1F12 #128F1F

tetradic

#1F128F #8F1244 #828F12 #128F5E

square

#1F128F #8F1244 #828F12 #128F5E

split-complementary

#1F128F #8F5E12 #448F12

monochromatic

#070422 #130B59 #1F128F #2B19C5 #4836E6

Accessibility & contrast

On white

13.62

#1F128F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1F128F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F128F

13.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F128F	#FFFFFF	#000000	##FFFFFF
##1F128F	1.00	13.62	1.54	13.62
#FFFFFF	13.62	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003392

Deuteranopia (green-blind)

#00288D

Tritanopia (blue-blind)

#003C54

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f128f;
/* rgb */ color: rgb(31, 18, 143);
/* oklch */ color: oklch(32.1% 0.186 272.9);

Tailwind

colors: {
  custom: {
    50: '#7156b1',
    500: '#1f128f',
    950: '#000000',
  },
}

SCSS

$custom: #1f128f;
$custom-light: #7156b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f128f",
  "rgb": {
    "r": 31,
    "g": 18,
    "b": 143
  },
  "hsl": {
    "h": 246.24,
    "s": 77.64,
    "l": 31.569
  },
  "oklch": {
    "l": 0.32089,
    "c": 0.18632,
    "h": 272.9
  },
  "luminance": 0.02707
}

Semantic roles & 50–950 ramp

primary

#1F128F

secondary

#B5C33A

accent

#F434E0

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1F128F

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

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