#1F177A#1F177A

#1F177A is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.1% C 0.157 H 275.0°. Best body text is #FFFFFF at 14.37:1 contrast (WCAG AA passes).

Color values

HEX	#1F177A
RGB	rgb(31, 23, 122)
HSL	hsl(245, 68%, 28%)
HSV	hsv(245, 81%, 48%)
CMYK	cmyk(74.6%, 81.1%, 0%, 52.2%)
CIE-LAB	lab(17.03, 36.93, -54.07)
CIE-LCH	lch(17.03, 65.48, 304.33°)
OKLab	oklab(30.09% 0.0137 -0.1564)
OKLCH	oklch(30.09% 0.157 275)
XYZ	xyz(4.3832, 2.3088, 18.6232)
Luminance	0.0231 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F177A #727A17

analogous

#17407A #1F177A #50177A

triadic

#1F177A #7A1F17 #177A1F

tetradic

#1F177A #7A1740 #727A17 #177A50

square

#1F177A #7A1740 #727A17 #177A50

split-complementary

#1F177A #7A5017 #407A17

monochromatic

#07051A #120D47 #1F177A #2C21AD #4033D9

Accessibility & contrast

On white

14.37

#1F177A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#1F177A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F177A

14.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F177A	#FFFFFF	#000000	##FFFFFF
##1F177A	1.00	14.37	1.46	14.37
#FFFFFF	14.37	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002E7D

Deuteranopia (green-blind)

#002578

Tritanopia (blue-blind)

#003548

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1f177a;
/* rgb */ color: rgb(31, 23, 122);
/* oklch */ color: oklch(30.1% 0.157 275.0);

Tailwind

colors: {
  custom: {
    50: '#6b57a2',
    500: '#1f177a',
    950: '#000000',
  },
}

SCSS

$custom: #1f177a;
$custom-light: #6b57a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f177a",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 122
  },
  "hsl": {
    "h": 244.848,
    "s": 68.276,
    "l": 28.431
  },
  "oklch": {
    "l": 0.30092,
    "c": 0.15696,
    "h": 275
  },
  "luminance": 0.02309
}

Semantic roles & 50–950 ramp

primary

#1F177A

secondary

#A6AF3E

accent

#EB3DDD

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1F177A

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

Preview Lab → · Contrast checker → · Palette generator →