#1F187F#1F187F

#1F187F is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.8% C 0.162 H 274.2°. Best body text is #FFFFFF at 14.04:1 contrast (WCAG AA passes).

Color values

HEX	#1F187F
RGB	rgb(31, 24, 127)
HSL	hsl(244, 68%, 30%)
HSV	hsv(244, 81%, 50%)
CMYK	cmyk(75.6%, 81.1%, 0%, 50.2%)
CIE-LAB	lab(17.81, 38.06, -55.97)
CIE-LCH	lch(17.81, 67.68, 304.22°)
OKLab	oklab(30.81% 0.0119 -0.1619)
OKLCH	oklch(30.81% 0.162 274.2)
XYZ	xyz(4.7212, 2.4764, 20.3037)
Luminance	0.0248 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F187F #787F18

analogous

#18447F #1F187F #53187F

triadic

#1F187F #7F1F18 #187F1F

tetradic

#1F187F #7F1844 #787F18 #187F53

square

#1F187F #7F1844 #787F18 #187F53

split-complementary

#1F187F #7F5318 #447F18

monochromatic

#06051A #120E4C #1F187F #2C22B2 #4338D9

Accessibility & contrast

On white

14.04

#1F187F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#1F187F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F187F

14.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F187F	#FFFFFF	#000000	##FFFFFF
##1F187F	1.00	14.04	1.50	14.04
#FFFFFF	14.04	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	14.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003082

Deuteranopia (green-blind)

#00277D

Tritanopia (blue-blind)

#00374B

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1f187f;
/* rgb */ color: rgb(31, 24, 127);
/* oklch */ color: oklch(30.8% 0.162 274.2);

Tailwind

colors: {
  custom: {
    50: '#6c57a5',
    500: '#1f187f',
    950: '#000000',
  },
}

SCSS

$custom: #1f187f;
$custom-light: #6c57a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f187f",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 127
  },
  "hsl": {
    "h": 244.078,
    "s": 68.212,
    "l": 29.608
  },
  "oklch": {
    "l": 0.30812,
    "c": 0.16232,
    "h": 274.2
  },
  "luminance": 0.02477
}

Semantic roles & 50–950 ramp

primary

#1F187F

secondary

#ABB33F

accent

#EB3DDF

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1F187F

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

Preview Lab → · Contrast checker → · Palette generator →