#1F357F#1F357F

#1F357F is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.9% C 0.128 H 267.1°. Best body text is #FFFFFF at 11.21:1 contrast (WCAG AA passes).

Color values

HEX	#1F357F
RGB	rgb(31, 53, 127)
HSL	hsl(226, 61%, 31%)
HSV	hsv(226, 76%, 50%)
CMYK	cmyk(75.6%, 58.3%, 0%, 50.2%)
CIE-LAB	lab(24.86, 19.23, -44.41)
CIE-LCH	lch(24.86, 48.40, 293.42°)
OKLab	oklab(35.94% -0.0065 -0.128)
OKLCH	oklch(35.94% 0.128 267.1)
XYZ	xyz(5.6676, 4.3692, 20.6192)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F357F #7F691F

analogous

#1F657F #1F357F #391F7F

triadic

#1F357F #7F1F35 #357F1F

tetradic

#1F357F #7F1F65 #7F691F #1F7F39

square

#1F357F #7F1F65 #7F691F #1F7F39

split-complementary

#1F357F #7F391F #657F1F

monochromatic

#070C1D #13204E #1F357F #2B4AB0 #4666D2

Accessibility & contrast

On white

11.21

#1F357F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1F357F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F357F

11.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F357F	#FFFFFF	#000000	##FFFFFF
##1F357F	1.00	11.21	1.87	11.21
#FFFFFF	11.21	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004082

Deuteranopia (green-blind)

#00377E

Tritanopia (blue-blind)

#004754

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f357f;
/* rgb */ color: rgb(31, 53, 127);
/* oklch */ color: oklch(35.9% 0.128 267.1);

Tailwind

colors: {
  custom: {
    50: '#696ba5',
    500: '#1f357f',
    950: '#000000',
  },
}

SCSS

$custom: #1f357f;
$custom-light: #696ba5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f357f",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 127
  },
  "hsl": {
    "h": 226.25,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.35937,
    "c": 0.12819,
    "h": 267.1
  },
  "luminance": 0.0437
}

Semantic roles & 50–950 ramp

primary

#1F357F

secondary

#B29A48

accent

#BF44E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F357F

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

Preview Lab → · Contrast checker → · Palette generator →