#1F255B#1F255B

#1F255B is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.4% C 0.096 H 274.1°. Best body text is #FFFFFF at 14.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F255B
RGB	rgb(31, 37, 91)
HSL	hsl(234, 49%, 24%)
HSV	hsv(234, 66%, 36%)
CMYK	cmyk(65.9%, 59.3%, 0%, 64.3%)
CIE-LAB	lab(17.32, 16.39, -33.35)
CIE-LCH	lch(17.32, 37.16, 296.16°)
OKLab	oklab(29.36% 0.0069 -0.0957)
OKLCH	oklch(29.36% 0.096 274.1)
XYZ	xyz(3.1143, 2.3695, 10.1887)
Luminance	0.0237 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F255B #5B551F

analogous

#1F435B #1F255B #371F5B

triadic

#1F255B #5B1F25 #255B1F

tetradic

#1F255B #5B1F43 #5B551F #1F5B37

square

#1F255B #5B1F43 #5B551F #1F5B37

split-complementary

#1F255B #5B371F #435B1F

monochromatic

#080917 #0F122D #1F255B #2F3889 #3E4AB6

Accessibility & contrast

On white

14.25

#1F255B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1F255B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F255B

14.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F255B	#FFFFFF	#000000	##FFFFFF
##1F255B	1.00	14.25	1.47	14.25
#FFFFFF	14.25	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D5D

Deuteranopia (green-blind)

#00285A

Tritanopia (blue-blind)

#00323C

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #1f255b;
/* rgb */ color: rgb(31, 37, 91);
/* oklch */ color: oklch(29.4% 0.096 274.1);

Tailwind

colors: {
  custom: {
    50: '#625f8a',
    500: '#1f255b',
    950: '#000000',
  },
}

SCSS

$custom: #1f255b;
$custom-light: #625f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f255b",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 91
  },
  "hsl": {
    "h": 234,
    "s": 49.18,
    "l": 23.922
  },
  "oklch": {
    "l": 0.29362,
    "c": 0.09599,
    "h": 274.1
  },
  "luminance": 0.0237
}

Semantic roles & 50–950 ramp

primary

#1F255B

secondary

#908846

accent

#CB4FD9

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05040C

muted

#7A797D

Preview Lab

Preview with #1F255B

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

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