#1F136B#1F136B

#1F136B is a dark, vivid blue. Relative luminance 0.018; OKLCH L 27.8% C 0.142 H 278.0°. Best body text is #FFFFFF at 15.40:1 contrast (WCAG AA passes).

Color values

HEX	#1F136B
RGB	rgb(31, 19, 107)
HSL	hsl(248, 70%, 25%)
HSV	hsv(248, 82%, 42%)
CMYK	cmyk(71%, 82.2%, 0%, 58%)
CIE-LAB	lab(14.50, 34.09, -48.54)
CIE-LCH	lch(14.50, 59.31, 305.08°)
OKLab	oklab(27.8% 0.0198 -0.1402)
OKLCH	oklch(27.8% 0.142 278)
XYZ	xyz(3.4509, 1.8183, 14.0762)
Luminance	0.0182 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F136B #5F6B13

analogous

#13336B #1F136B #4B136B

triadic

#1F136B #6B1F13 #136B1F

tetradic

#1F136B #6B1333 #5F6B13 #136B4B

square

#1F136B #6B1333 #5F6B13 #136B4B

split-complementary

#1F136B #6B4B13 #336B13

monochromatic

#08051A #100A37 #1F136B #2E1C9F #3D25D3

Accessibility & contrast

On white

15.40

#1F136B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#1F136B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F136B

15.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F136B	#FFFFFF	#000000	##FFFFFF
##1F136B	1.00	15.40	1.36	15.40
#FFFFFF	15.40	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00286D

Deuteranopia (green-blind)

#002169

Tritanopia (blue-blind)

#002D3F

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1f136b;
/* rgb */ color: rgb(31, 19, 107);
/* oklch */ color: oklch(27.8% 0.142 278.0);

Tailwind

colors: {
  custom: {
    50: '#685396',
    500: '#1f136b',
    950: '#000000',
  },
}

SCSS

$custom: #1f136b;
$custom-light: #685396;
$custom-dark: #000000;

JSON

{
  "hex": "#1f136b",
  "rgb": {
    "r": 31,
    "g": 19,
    "b": 107
  },
  "hsl": {
    "h": 248.182,
    "s": 69.841,
    "l": 24.706
  },
  "oklch": {
    "l": 0.27804,
    "c": 0.14161,
    "h": 278
  },
  "luminance": 0.01819
}

Semantic roles & 50–950 ramp

primary

#1F136B

secondary

#94A238

accent

#ED3BD4

background

#F6F4F9

surface

#EBE7F2

border

#C6C3CC

text

#07020D

muted

#7A787E

Preview Lab

Preview with #1F136B

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

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