#1B276F#1B276F

#1B276F is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.4% C 0.125 H 270.2°. Best body text is #FFFFFF at 13.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B276F
RGB	rgb(27, 39, 111)
HSL	hsl(231, 61%, 27%)
HSV	hsv(231, 76%, 44%)
CMYK	cmyk(75.7%, 64.9%, 0%, 56.5%)
CIE-LAB	lab(19.36, 22.19, -43.18)
CIE-LCH	lch(19.36, 48.54, 297.20°)
OKLab	oklab(31.35% 0.0004 -0.1247)
OKLCH	oklch(31.35% 0.125 270.2)
XYZ	xyz(4.0458, 2.8313, 15.3691)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B276F #6F631B

analogous

#1B516F #1B276F #391B6F

triadic

#1B276F #6F1B27 #276F1B

tetradic

#1B276F #6F1B51 #6F631B #1B6F39

square

#1B276F #6F1B51 #6F631B #1B6F39

split-complementary

#1B276F #6F391B #516F1B

monochromatic

#060919 #0F163E #1B276F #2738A0 #364CCE

Accessibility & contrast

On white

13.41

#1B276F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1B276F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B276F

13.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B276F	#FFFFFF	#000000	##FFFFFF
##1B276F	1.00	13.41	1.57	13.41
#FFFFFF	13.41	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003371

Deuteranopia (green-blind)

#002B6E

Tritanopia (blue-blind)

#003947

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b276f;
/* rgb */ color: rgb(27, 39, 111);
/* oklch */ color: oklch(31.4% 0.125 270.2);

Tailwind

colors: {
  custom: {
    50: '#656199',
    500: '#1b276f',
    950: '#000000',
  },
}

SCSS

$custom: #1b276f;
$custom-light: #656199;
$custom-dark: #000000;

JSON

{
  "hex": "#1b276f",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 111
  },
  "hsl": {
    "h": 231.429,
    "s": 60.87,
    "l": 27.059
  },
  "oklch": {
    "l": 0.3135,
    "c": 0.12468,
    "h": 270.2
  },
  "luminance": 0.02832
}

Semantic roles & 50–950 ramp

primary

#1B276F

secondary

#A49642

accent

#CD44E4

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #1B276F

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

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