#1F279B#1F279B

#1F279B is a dark, vivid blue. Relative luminance 0.041; OKLCH L 36.1% C 0.183 H 270.1°. Best body text is #FFFFFF at 11.53:1 contrast (WCAG AA passes).

Color values

HEX	#1F279B
RGB	rgb(31, 39, 155)
HSL	hsl(236, 67%, 36%)
HSV	hsv(236, 80%, 61%)
CMYK	cmyk(80%, 74.8%, 0%, 39.2%)
CIE-LAB	lab(24.03, 39.09, -63.15)
CIE-LCH	lch(24.03, 74.27, 301.75°)
OKLab	oklab(36.14% 0.0002 -0.1829)
OKLCH	oklch(36.14% 0.183 270.1)
XYZ	xyz(7.2050, 4.1081, 31.4172)
Luminance	0.0411 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F279B #9B931F

analogous

#1F659B #1F279B #551F9B

triadic

#1F279B #9B1F27 #279B1F

tetradic

#1F279B #9B1F65 #9B931F #1F9B55

square

#1F279B #9B1F65 #9B931F #1F9B55

split-complementary

#1F279B #9B551F #659B1F

monochromatic

#0B0D35 #151A68 #1F279B #2934CE #5760DD

Accessibility & contrast

On white

11.53

#1F279B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1F279B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F279B

11.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F279B	#FFFFFF	#000000	##FFFFFF
##1F279B	1.00	11.53	1.82	11.53
#FFFFFF	11.53	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F9E

Deuteranopia (green-blind)

#003399

Tritanopia (blue-blind)

#00495F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f279b;
/* rgb */ color: rgb(31, 39, 155);
/* oklch */ color: oklch(36.1% 0.183 270.1);

Tailwind

colors: {
  custom: {
    50: '#7262ba',
    500: '#1f279b',
    950: '#000000',
  },
}

SCSS

$custom: #1f279b;
$custom-light: #7262ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f279b",
  "rgb": {
    "r": 31,
    "g": 39,
    "b": 155
  },
  "hsl": {
    "h": 236.129,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.3614,
    "c": 0.18291,
    "h": 270.1
  },
  "luminance": 0.04109
}

Semantic roles & 50–950 ramp

primary

#1F279B

secondary

#C1BA55

accent

#DF3EEA

background

#F7F5FB

surface

#EEEAF6

border

#C9C6D0

text

#090512

muted

#7B7981

Preview Lab

Preview with #1F279B

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

Preview Lab → · Contrast checker → · Palette generator →