#1D256F#1D256F

#1D256F is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.1% C 0.127 H 271.9°. Best body text is #FFFFFF at 13.58:1 contrast (WCAG AA passes).

Color values

HEX	#1D256F
RGB	rgb(29, 37, 111)
HSL	hsl(234, 59%, 27%)
HSV	hsv(234, 74%, 44%)
CMYK	cmyk(73.9%, 66.7%, 0%, 56.5%)
CIE-LAB	lab(18.94, 23.86, -43.86)
CIE-LCH	lch(18.94, 49.93, 298.55°)
OKLab	oklab(31.07% 0.0042 -0.1267)
OKLCH	oklch(31.07% 0.127 271.9)
XYZ	xyz(4.0365, 2.7316, 15.3504)
Luminance	0.0273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D256F #6F671D

analogous

#1D4E6F #1D256F #3E1D6F

triadic

#1D256F #6F1D25 #256F1D

tetradic

#1D256F #6F1D4E #6F671D #1D6F3E

square

#1D256F #6F1D4E #6F671D #1D6F3E

split-complementary

#1D256F #6F3E1D #4E6F1D

monochromatic

#060818 #10153E #1D256F #2A35A0 #3B49CC

Accessibility & contrast

On white

13.58

#1D256F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1D256F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D256F

13.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D256F	#FFFFFF	#000000	##FFFFFF
##1D256F	1.00	13.58	1.55	13.58
#FFFFFF	13.58	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003271

Deuteranopia (green-blind)

#002A6E

Tritanopia (blue-blind)

#003846

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1d256f;
/* rgb */ color: rgb(29, 37, 111);
/* oklch */ color: oklch(31.1% 0.127 271.9);

Tailwind

colors: {
  custom: {
    50: '#665f99',
    500: '#1d256f',
    950: '#000000',
  },
}

SCSS

$custom: #1d256f;
$custom-light: #665f99;
$custom-dark: #000000;

JSON

{
  "hex": "#1d256f",
  "rgb": {
    "r": 29,
    "g": 37,
    "b": 111
  },
  "hsl": {
    "h": 234.146,
    "s": 58.571,
    "l": 27.451
  },
  "oklch": {
    "l": 0.31072,
    "c": 0.12672,
    "h": 271.9
  },
  "luminance": 0.02732
}

Semantic roles & 50–950 ramp

primary

#1D256F

secondary

#A39A44

accent

#D346E2

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040E

muted

#7A797E

Preview Lab

Preview with #1D256F

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

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