#1F298B#1F298B

#1F298B is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.8% C 0.160 H 270.5°. Best body text is #FFFFFF at 12.01:1 contrast (WCAG AA passes).

Color values

HEX	#1F298B
RGB	rgb(31, 41, 139)
HSL	hsl(234, 64%, 33%)
HSV	hsv(234, 78%, 55%)
CMYK	cmyk(77.7%, 70.5%, 0%, 45.5%)
CIE-LAB	lab(22.79, 32.05, -55.30)
CIE-LCH	lch(22.79, 63.91, 300.10°)
OKLab	oklab(34.75% 0.0014 -0.16)
OKLCH	oklch(34.75% 0.16 270.5)
XYZ	xyz(6.0166, 3.7406, 24.8260)
Luminance	0.0374 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F298B #8B811F

analogous

#1F5F8B #1F298B #4B1F8B

triadic

#1F298B #8B1F29 #298B1F

tetradic

#1F298B #8B1F5F #8B811F #1F8B4B

square

#1F298B #8B1F5F #8B811F #1F8B4B

split-complementary

#1F298B #8B4B1F #5F8B1F

monochromatic

#090B27 #141A59 #1F298B #2A38BD #4D5AD7

Accessibility & contrast

On white

12.01

#1F298B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1F298B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F298B

12.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F298B	#FFFFFF	#000000	##FFFFFF
##1F298B	1.00	12.01	1.75	12.01
#FFFFFF	12.01	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8E

Deuteranopia (green-blind)

#003189

Tritanopia (blue-blind)

#004456

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f298b;
/* rgb */ color: rgb(31, 41, 139);
/* oklch */ color: oklch(34.8% 0.160 270.5);

Tailwind

colors: {
  custom: {
    50: '#6e63ae',
    500: '#1f298b',
    950: '#000000',
  },
}

SCSS

$custom: #1f298b;
$custom-light: #6e63ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f298b",
  "rgb": {
    "r": 31,
    "g": 41,
    "b": 139
  },
  "hsl": {
    "h": 234.444,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.34752,
    "c": 0.16005,
    "h": 270.5
  },
  "luminance": 0.03741
}

Semantic roles & 50–950 ramp

primary

#1F298B

secondary

#BAB04C

accent

#D741E7

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F298B

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

Preview Lab → · Contrast checker → · Palette generator →