#1F257C#1F257C

#1F257C is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.5% C 0.144 H 272.2°. Best body text is #FFFFFF at 13.01:1 contrast (WCAG AA passes).

Color values

HEX	#1F257C
RGB	rgb(31, 37, 124)
HSL	hsl(236, 60%, 30%)
HSV	hsv(236, 75%, 49%)
CMYK	cmyk(75%, 70.2%, 0%, 51.4%)
CIE-LAB	lab(20.32, 29.08, -49.92)
CIE-LCH	lch(20.32, 57.78, 300.22°)
OKLab	oklab(32.5% 0.0055 -0.1444)
OKLCH	oklch(32.5% 0.144 272.2)
XYZ	xyz(4.8635, 3.0692, 19.4010)
Luminance	0.0307 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F257C #7C761F

analogous

#1F537C #1F257C #471F7C

triadic

#1F257C #7C1F25 #257C1F

tetradic

#1F257C #7C1F53 #7C761F #1F7C47

square

#1F257C #7C1F53 #7C761F #1F7C47

split-complementary

#1F257C #7C471F #537C1F

monochromatic

#07081A #13164B #1F257C #2B34AD #454ED0

Accessibility & contrast

On white

13.01

#1F257C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1F257C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F257C

13.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F257C	#FFFFFF	#000000	##FFFFFF
##1F257C	1.00	13.01	1.61	13.01
#FFFFFF	13.01	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00357F

Deuteranopia (green-blind)

#002D7A

Tritanopia (blue-blind)

#003C4D

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f257c;
/* rgb */ color: rgb(31, 37, 124);
/* oklch */ color: oklch(32.5% 0.144 272.2);

Tailwind

colors: {
  custom: {
    50: '#6a60a3',
    500: '#1f257c',
    950: '#000000',
  },
}

SCSS

$custom: #1f257c;
$custom-light: #6a60a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f257c",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 124
  },
  "hsl": {
    "h": 236.129,
    "s": 60,
    "l": 30.392
  },
  "oklch": {
    "l": 0.32501,
    "c": 0.14446,
    "h": 272.2
  },
  "luminance": 0.0307
}

Semantic roles & 50–950 ramp

primary

#1F257C

secondary

#AFA948

accent

#D945E3

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F257C

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

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